Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e86a3f7a725ec0…

MALICIOUS

PDF

73.2 KB Created: 2020-11-10 04:54:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 615704113ef84a2a4b94b13c70f4e748 SHA-1: d4d0e82a717f647841885c8af91ce3eeff377aaa SHA-256: a0e86a3f7a725ec0768ee0be79d2a6325f9ff25e3cbd1a1aa46e405d786fb03c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/strik?keyword=samsung+rf260beaesr+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f8a51f8e679c.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/nuvotuzopib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5f8a195fc6f5e.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/zapolasogeju.pdfIn PDF document text
    • https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/fabupuzoguridabad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_5fa9b873dcf89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5f8a5a0c2d194.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/xizefotiwira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_5fa32e672f9eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5f973af87fc1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f9b52996e5cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_5fa777fb9acb7.pdfIn PDF document text
    • https://duvupobilalef.weebly.com/uploads/1/3/4/6/134630448/7087663.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
    • https://uploads.strikinglycdn.com/files/f903eafc-b70c-42ff-9200-0fa93002af77/assassin_s_creed_odyssey_choice_gui.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25B 5400 bytes
SHA-256: 76ddd37cf0d0ad409379268ed62d6d90f5708790bf6d3d8909632b96189af046
font_01_sfnt_off0000e483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 10900 bytes
SHA-256: 3f9bbd80da35409c19ca8c28f1386b04a6cd584f48627a9722e76bf463f9b98f
font_02_sfnt_off000109a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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