Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0ee1d81d7253fa…

MALICIOUS

PDF

151.6 KB Created: 2021-06-29 02:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 05b3e41b709372d67178d85f68395590 SHA-1: d25ea31bbd7ffd34105cd78acf4735d9d3959929 SHA-256: dd0ee1d81d7253fa6b5a9e8a44e611393f3c39d77ed729995caea540bb24d16f
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's part of an advance-fee scam. It contains numerous links to external websites, many of which host PDFs within compromised WordPress installations or on disposable hosting. The primary lure appears to be related to lotteries, prizes, or parcel deliveries, designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://archism.ru/uplcv?utm_term=nirc+of+1997+as+amended+by+ra+10963 PDF link annotation
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6a6047d6e---zodijuw.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/vean5sm02k77qo84bnm1v1c9em/23895169467.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/66602375998.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073fe9aee857---27735913781.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bb3569312---sisurerujopufuzopej.pdfPDF link annotation
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160770d46c4283---vegiwe.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/4aeb40eb13f1ecf4ba7be5dee4bc191b/67901911623.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/taxiwajomipativiz.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608acbfe5046f---lebazufozovafetanumixoke.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/linonosevebibunulufov.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4ee605745---54112451305.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160780e956a6fb---89597012445.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718724cdbdd---sukem.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/fobilaxivuj.pdfIn PDF document text
    • http://alkanboya.com/files/file///mopobiwameli.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/zasijema.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/bupibosa.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/voviluvopogamebubod.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/5e219cd7e203125db19f75206e7cbefb/zupaka.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/5cdc04672f0e8864ad9ed6b88729ab3e/29330754838.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/6d07922f6e662498682f63c4df13ef88/33536970436.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/wipaverekafowekijefidukop.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/1283829933.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/41022692242.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/25208944777.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/jlo84q4e46akvkg0nk5feo95n1/digelagupipe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ee1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002062e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2062E 17868 bytes
SHA-256: 67f48d795ab38e8db6277a763d6519b7fd4a6bad7405ac0eff9eb6e7a34aea88
font_02_sfnt_off00023514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23514 11456 bytes
SHA-256: b0c18bd4b82c3d964b60f74287f3ae770a955175d16d686abff9bfd03f709256

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