Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62e85a5eca66b9b…

MALICIOUS

PDF

76.3 KB Created: 2021-04-08 01:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a4398f4d79ab211f5273be82c1c30187 SHA-1: b2186f280b30b47aea400ea6cea32ff848c775b2 SHA-256: f62e85a5eca66b9bbbd60d13ec918a7dea9bb8b6fb7d9ced8fa5d09113c5cbad
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://seumenha.ru/strik?utm_term=free+printable+weekly+weight+loss+charts PDF link annotation
    • http://wutanumijejol.sportsontheweb.net/marlin_60_22lr_canada.pdfIn PDF document text
    • http://kamefutebiwef.mywebcommunity.org/nutrition_in_pregnancy_and_lactation.pdfIn PDF document text
    • http://vonilopume.22web.org/wupim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tutivute.epizy.com/gevanepokituwejisani.pdfIn PDF document text
    • http://lefumes.rf.gd/3716710462.pdfIn PDF document text
    • http://zujapataluzipo.epizy.com/apc_be550g-gr_user_manual.pdfIn PDF document text
    • https://abf133a7-37c0-4616-b653-d99fd306bce3.filesusr.com/ugd/5c8236_1f0fc78f14684dcfa3d3de551901552f.pdf?index=trueIn PDF document text
    • http://xisuwujilaxemer.myartsonline.com/rixalifide.pdfIn PDF document text
    • http://senajukuwizef.epizy.com/chhattisgarh_political_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8c1ab0-0b47-41c9-b8ed-f9bb833e05bd/61555143630.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/vixadabomigoledujo.pdfIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_bdd08e29060b4baa9ef8b5a352527a24.pdf?index=trueIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_a118e70864a84b07ae716297ac89d4ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ccdc8cf-ddbe-42b5-9cca-99fb6e4b74a2/latajaxoguxopaxaj.pdfIn PDF document text
    • http://lobivovakebala.epizy.com/58636823764.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/23902880617.pdfIn PDF document text
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_e05a92ddeaad4ca78aabc4f835cfcbd6.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF43 5336 bytes
SHA-256: e3fb5240842a747738b599d05bd71b6b7f3f9fa7549a1f69ee6c0bacee492dfb
font_01_sfnt_off0000f16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16B 10636 bytes
SHA-256: d60860dd2cdb9c5a526e778b6f18bf01f313fef840062e6ce033e6c790537566
font_02_sfnt_off000115c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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