Malicious PDF — malware analysis report

Static analysis result for SHA-256 470e47cb848c53b7…

MALICIOUS

PDF

109.3 KB Created: 2021-09-07 19:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a4cf27538d71903c1cd83997d428d12e SHA-1: c39cddd2a519a7f9a55ba35e04c6463aa99591c0 SHA-256: 470e47cb848c53b75c2ccc6f16ac588cd0ce42ff6ba9c1bdf48178e023e387aa
204 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It impersonates Amazon, a known brand, and uses a fake invoice lure to trick users into clicking a link. The linked URLs point to compromised WordPress sites hosting further PDF files, suggesting a phishing campaign designed to steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=plan+comptable+2019+pdf.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160f41dc85ae3a---tetifatodovexaluzap.pdf In PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/63c91ae26e789f1f6851e23e099e9d0c/84848788652.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d3a242b41---paxopofupofeve.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160832ed1f1b0a---75741824741.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/97232227818.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/48006940786.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/kipixulazemeranu.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/wasozosiko.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc3f6e4daa---kegobonexixu.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/zazifagiwegekov.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/f0ukajbocovv8qiqbvun2dvss3/katozibipirafulitamuri.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1bff1a8423---33209477423.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/gisudibesezunizesaliferaj.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bddc2e667ad---dozagopafabinutabove.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/45683871834.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/3274586386.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/xatajobibuzozax.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/siwaxazujotivolibik.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/papulinevos.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/gomesomobozajobu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=plan+comptable+2019+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14258 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A6A 19588 bytes
SHA-256: 4ad524c1af532c802ebb992481ba66c0958f8e5016640dfb8946b217c4d02d9e
font_02_sfnt_off00018cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CCA 11024 bytes
SHA-256: 22a0558dd3481046ef3d8e736fe33c604db0cafc7594c0cc0043cc75f635cd6e

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