Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d206085a8e669d…

MALICIOUS

PDF

101.2 KB Created: 2021-01-25 10:23:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 961d584e53d43fbf7e66ab063482a8b0 SHA-1: 94e49f6073be54ee15aa0208d9bff44b4ef84918 SHA-256: f7d206085a8e669d14092c8a81cfb112ebf2298eeef79173603498fb48bc7292
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical detection for a PDF link farm and a ClamAV signature indicating phishing and trojan activity. The file contains a large number of external URLs pointing to other PDF documents, suggesting a coordinated effort to distribute content or redirect users. No scripts were extracted from this sample, but the structure and URL distribution are indicative of a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/aws?utm_term=american+apheresis+guidelines PDF link annotation
    • http://atomyimperial.ru/espn_fantasy_sports_twitter9wwa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463298/normal_600a4b7231d0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484356/normal_5fee73c30597e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5ffd9e0f10df5.pdfIn PDF document text
    • https://duparumiwope.weebly.com/uploads/1/3/4/7/134707207/wumarabumunosig-wepesabusam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379482/normal_5ffd09d40f141.pdfIn PDF document text
    • http://parhelifrl.space/13862432330xf9lt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487197/normal_5fe5faca6efca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470223/normal_5fc701cd5fa97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366339/normal_5fcd059a75482.pdfIn PDF document text
    • https://wirupexulabajes.weebly.com/uploads/1/3/5/3/135322132/goduf-tiwutoxexipika-fuxavosi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_600e2646ebf5d.pdfIn PDF document text
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/vujazamurit-nulodezon-vuporikipemif-gupalowidapo.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/mnjciUA/240922347.pdfIn PDF document text
    • https://cdn.sqhk.co/xekowodu/gTeibnF/bupapeduwipobasepudejeb.pdfIn PDF document text
    • https://cdn.sqhk.co/bujedebi/heUibgi/lovufezebodelikisoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/basujun.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/arris_modem_sbg6580_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/graduate_survival_guide_dave_ramsey.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://scripts.sil.org/OFLIn 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_off000135c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C6 5476 bytes
SHA-256: de01a735f8a6e8fee24c8bbbf3419c74bd446c875a3a8a6c9f1569f24d97d8fe
font_01_sfnt_off00014837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14837 13508 bytes
SHA-256: f46ed981b1815facad5a2218a56de77eb34584806d64ce3c7d6df26d7248dfe0
font_02_sfnt_off00017267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17267 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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