Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7e6b664a71aded…

MALICIOUS

PDF

63.8 KB Created: 2020-11-21 07:54:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cdebbe37d4200c90f876ac882743ecd2 SHA-1: d8cadccc4361cff473b6ee1d53d7e924ebecfa9d SHA-256: fa7e6b664a71adedde104481c04ea4795ad0e113d90c2c494975f7f304b72029
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://traffnew.ru/123?utm_term=butterfly+garden+orlando+florida PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469630/normal_5fb81f625a155.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/wuvagitutadovalubulo.pdfIn PDF document text
    • https://lakujasoramaw.weebly.com/uploads/1/3/4/4/134400634/xenefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5f8c27aad12dd.pdfIn PDF document text
    • https://xekozetona.weebly.com/uploads/1/3/4/5/134508060/20979c8fde74492.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/17563d38f77.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/8610616.pdfIn PDF document text
    • https://saxepuxuk.weebly.com/uploads/1/3/4/4/134472003/feb864116e8e.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/wupiwupiwot/tripwire_lee_child.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa4872d-7843-463c-b0e5-248c593d08a5/facts_about_ares_the_god_of_war.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5edf5712-de29-4537-b26f-b22d1f59a501/when_was_dont_blame_the_eater_written.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/candidose_cutane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4453bb1-60a2-4829-80b1-6e3f920dbd44/wsfcs_afm_pacing_guide.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_off0000c204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC204 5048 bytes
SHA-256: 18d482d02fd354bee1466fc1d250f9e7f7741ba6c8d23bcd341ca47d9c3561e6
font_01_sfnt_off0000d34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34E 9204 bytes
SHA-256: f9d8551b01bf27b861add6107ce7e660f78452191a97dc0307e32f3609d1e043

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