Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff0d907bf715e41…

MALICIOUS

PDF

79.6 KB Created: 2021-03-22 21:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2de06c86049c9ef657f6b5fe54478653 SHA-1: 58b889920f522b9fe844513c272cc667e9e4feb6 SHA-256: 4ff0d907bf715e416390e93130b799c538089ef20143793da46607a36842ce5a
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://seumenha.ru/wix?keyword=pandora+music+cracked+apk PDF link annotation
    • http://nazhivy.net/3775796601nonco.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446174/normal_601b0ed4b963d.pdfIn PDF document text
    • https://sosepokapebovi.weebly.com/uploads/1/3/0/8/130814645/nozemajob_rerikale_bomazita.pdfIn PDF document text
    • http://com-signto6.xyz/diary_of_a_street_diva_free_downloadg7b19.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/alijaGu/weed_farmers_market_massachusetts.pdfIn PDF document text
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/3902876.pdfIn PDF document text
    • https://vemenujobife.weebly.com/uploads/1/3/5/3/135399872/wuroj.pdfIn PDF document text
    • https://tebideronapiza.weebly.com/uploads/1/3/1/4/131483209/runuraj.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CvgiczF/ragaduwojak.pdfIn PDF document text
    • https://xegoratan.weebly.com/uploads/1/3/2/7/132712572/08818ddf94d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460251/normal_600c7a8494fa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_601db654e5393.pdfIn PDF document text
    • https://ruxosegid.weebly.com/uploads/1/3/4/2/134265817/3ee4e5b3.pdfIn PDF document text
    • https://wopokajam.weebly.com/uploads/1/3/0/8/130874492/detixowunuguvabu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408583/normal_602ece06103e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a468c06-122e-4e53-9950-37c8980bed94/16461398478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c1172e3-976d-4c06-81d1-1edd38a269e1/99340696086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64406b2-7dbe-4d6e-863a-a3625b1294a4/should_earth_always_be_capitalized.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18827453-0644-4d7e-bd85-2937a2a173b1/harry_potter_2020_lego_advent_calendar_day_23.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71c210c-4a10-463f-95e5-68e3f559c6a0/electrical_engineering_objective_questions_and_answers.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_off0000ebbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBB 5252 bytes
SHA-256: c3ff65eaefd0f20f8f4ddba09a970761b4a797d03e89be0e4a4ccf19dba63b6d
font_01_sfnt_off0000fd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 22132 bytes
SHA-256: 3b9dc99eab188050128600f45969a2a7ab3eff830437dbe47dbb49bb40c67f36

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