Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf23ee9b489cfb4…

MALICIOUS

PDF

76.8 KB Created: 2021-05-14 18:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1ce4134ef09a3aafbdfa93b6d3eeb836 SHA-1: 52d947d6e46ce3b57fe66f83ff5956c46e7b0192 SHA-256: eaf23ee9b489cfb428acfe474bb1fcf5f28955186d4ec408a4e4f095c0562859
164 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. It uses an urgency-based lure. 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 0.9993

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/strik?utm_term=line+6+spider+2+service+manual PDF link annotation
    • https://cdn.sqhk.co/zowonefaso/gftgjW9/70483000884.pdfIn PDF document text
    • https://fikazimibugexu.weebly.com/uploads/1/3/4/5/134515259/sapuj.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/gg9hiIN/37646354368.pdfIn PDF document text
    • https://cdn.sqhk.co/zidomirit/iP0wAcE/malayalam_funny_status_video_for_whatsapp.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/8315664.pdfIn PDF document text
    • https://zomedavox.weebly.com/uploads/1/3/4/3/134392748/jisutasatipinedage.pdfIn PDF document text
    • https://bevaxudemu.weebly.com/uploads/1/3/4/3/134318806/5892077.pdfIn PDF document text
    • https://sekugiwa.weebly.com/uploads/1/3/0/7/130739582/biletum.pdfIn PDF document text
    • https://cdn.sqhk.co/kopenanum/k1bhejd/69537433514.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/rujabepifar/burup.pdfIn PDF document text
    • http://kewuzelaxapog.rf.gd/28857218954.pdfIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_e0820a0ce61a4e1281bc9a973434ecda.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5bb4b82-9c55-4a18-bba6-fc61f66cc374/john_deere_z225_engine_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/kofofovajavifuv.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/15542904420.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/28340384517.pdfIn PDF document text
    • https://9eff4bf0-55a5-42b9-a65a-250f23c32afd.filesusr.com/ugd/80978b_47502aae5d7a49ff8d5a67aa1fd26a73.pdf?index=trueIn PDF document text
    • http://degepedafapuf.epizy.com/1146178337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da048547-3313-4fb1-8694-8171158d4e0d/89276983759.pdfIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_fc24ee92ddd64983923c39276e3b37ca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e8bed5-6368-4e02-8b56-42b13c8a33b4/mawebewi.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/pajuzorewovuvub.pdfIn PDF document text
    • https://4d3f6715-1114-433d-a4b7-45a5e22e3858.filesusr.com/ugd/ce86b4_cd725400fcf0485a9b82b223c12566f9.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC4 5504 bytes
SHA-256: 9a2cee3ec5a92f7877eec19e36a122e0fdd30c38b2aee23a12be00d80ce2aa6f
font_01_sfnt_off0001026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 10404 bytes
SHA-256: 1ec01f72abc1f0b00bb01091918059ad6e42d7d3b3890713f2ce944336572f87

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