Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2b22090e8b5710…

MALICIOUS

PDF

87.4 KB Created: 2021-08-06 04:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8b72e3e34a12eeeb30a5f0b3f1f1fda5 SHA-1: a67ea6b8d4bd10fa3a1d82c8a3eb0ffe734ac8d9 SHA-256: bb2b22090e8b5710bd313ce046cf96f8598a91adf6c09c639ed0223d3ded489a
176 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URIs pointing to compromised or disposable hosting domains, forming a link farm. The presence of these links suggests an attempt to direct users to malicious websites, likely for phishing or to download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16098633428c45---fijivu.pdf In PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c706511d01---zubifimakizutol.pdfIn PDF document text
    • http://okgwa.net/50/files1/file/15696698763.pdfIn PDF document text
    • https://12tiga.com/contents//files/razugidumumegipepe.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/c80782546ba785152f821d0c4b4a5e2d/vowazufugenabuzurogu.pdfIn PDF document text
    • http://beijingbeat.com/contents//files/nabavanuzufukadeza.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210724_082253.pdfPDF link annotation
    • http://uchid.com/uploads/file/56945077586.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/nosirisulaxadezut.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/36d7ea239648949ebc362dfa265ae59e/tiwutukavawudukiromo.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c87d021d9d2---90353157246.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc3511008a---zufotupifonopuwerikixo.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/b5bd63201f180014e5d789f3f2fce93e/wuwozevusedoxu.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/9foijudnj9a443ue5e173v0ned/bemum.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/6r32valebtcuh803qsqh7mso0n/27398802049.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/16816516880.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/woraserupetipizabamekufol.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210713_FCBA8DCC0D96F85B.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/rukepegajalanitixil.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/c415dde6a251f41ff3618d6011408bd8/vusaxemunewodogejis.pdfIn PDF document text
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/ludidajim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=beckett+by+honeywell+r7184b+bleed+valvePDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11C 11148 bytes
SHA-256: 7695a41f9bdc8eb1455983e391430b1ba635eecb813bfb505d587da6f26444c6
font_01_sfnt_off00010b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12370 16684 bytes
SHA-256: f993917aa0a58d9d8d74b1f3d5446406dfe145aa58a6caaee7ff51a1ae26f97a

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