Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a54351a97190f2…

MALICIOUS

PDF

79.6 KB Created: 2021-03-25 10:04:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 00d45e3f4b47db7f916bba5f04841900 SHA-1: e9dd6c961693d9f5e4685c1b94a9f9e9d6774c88 SHA-256: 38a54351a97190f2a458da20c4f4998cd047ee73839bda3917358a6d5eadeff5
186 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 0.9998

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.
  • 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://golowaki.ru/wix?keyword=gta+san+andreas+apk+data+mod+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466172/normal_600d8f75f1743.pdfIn PDF document text
    • https://kitivagep.weebly.com/uploads/1/3/0/7/130775950/jejolujefedu-muxivepuzupajo-jorifi-porimamilo.pdfIn PDF document text
    • http://bapulesaj.mygamesonline.org/futorebege.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496193/normal_5fca6a7dd6d31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384483/normal_5feea0da11145.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/lavoredilekebabov.pdfIn PDF document text
    • https://viwekaxirudadax.weebly.com/uploads/1/3/4/7/134700275/japevebewodasin.pdfIn PDF document text
    • http://sukujugonada.22web.org/51888926840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410975/normal_601885c30abaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lowevetefevug.rf.gd/miwimegavewu.pdfIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_9ee5842fb7a9410a9e2db8b1ff5b08c4.pdf?index=trueIn PDF document text
    • https://54fa3baf-6954-44a2-98df-2137f0cc340f.filesusr.com/ugd/14b79e_7cca46c6cbfd43699891d577d602ff62.pdf?index=trueIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_a1c7143c47ea44709c5c4c6fa8d0f13d.pdf?index=trueIn PDF document text
    • https://ac614e2c-2e00-43e4-a80f-2c6bce9fb64b.filesusr.com/ugd/f103bb_f9809ff4cd1c4a8886de224b12c53a1a.pdf?index=trueIn PDF document text
    • http://posufimiru.rf.gd/56447168650.pdfIn PDF document text
    • http://zenomidesedi.rf.gd/bluetooth_barcode_scanner_apk.pdfIn PDF document text
    • http://zuruwejofuxeja.epizy.com/funuvixazelo.pdfIn PDF document text
    • http://jerasopel.epizy.com/bhaubij_song_audio.pdfIn PDF document text
    • http://dukanoro.epizy.com/36067386934.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0B 5292 bytes
SHA-256: 054afac872b8a88d0a442aed5ff2f45bd9b803371ecedea8ab2f96330fc8769c
font_01_sfnt_off00010c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0E 10864 bytes
SHA-256: ca9184e0ca1b0f1c9f412dd11699beff12441c75308147f53ddab4bb69c50c36

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