Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ee2cf206e52eec…

MALICIOUS

PDF

85.9 KB Created: 2021-02-22 07:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2bc2c3b22b7437c3f6cbcec5cedae38b SHA-1: 57612206a24579c68a6b32a383339df144c768c5 SHA-256: 09ee2cf206e52eecd8c5237250455ef24f8e8bb234b364edec8eb17a01619c7a
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 0.9996

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://leonvi.ru/123?utm_term=how+do+i+forward+calls+on+my+avaya+2420+phone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476578/normal_601f01271e382.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/KUupijy/bizanexiloberaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387807/normal_601d75755bc59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425772/normal_5fdec351cb5fb.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzozuni/a2ietzY/90647153199.pdfIn PDF document text
    • https://rinezafuwokof.weebly.com/uploads/1/3/1/4/131437641/1775016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5fd63e64551df.pdfIn PDF document text
    • https://cdn.sqhk.co/fovulifavu/fCWJjeU/shoot_me_down_song_download_mp3.pdfIn PDF document text
    • https://jagefefax.weebly.com/uploads/1/3/4/2/134235663/tijituran.pdfIn PDF document text
    • https://nogisapu.weebly.com/uploads/1/3/1/4/131453993/c3b7401e0.pdfIn PDF document text
    • https://guvoxokogavi.weebly.com/uploads/1/3/4/3/134374443/1e9a69893ff9.pdfIn PDF document text
    • https://salabupomisopef.weebly.com/uploads/1/3/4/6/134631393/8d0ca225a46e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481067/normal_5ff8973789db1.pdfIn PDF document text
    • https://wazasamiv.weebly.com/uploads/1/3/0/7/130775889/0c1d5a6049a.pdfIn PDF document text
    • https://kakituku.weebly.com/uploads/1/3/4/5/134589995/8c0f52881bf.pdfIn PDF document text
    • https://pirogitemaxo.weebly.com/uploads/1/3/1/0/131070842/b29f6e1.pdfIn PDF document text
    • https://wutejaguruloz.weebly.com/uploads/1/3/1/8/131871665/dfac0f.pdfIn PDF document text
    • https://difekubo.weebly.com/uploads/1/3/4/7/134714923/liruzagaxufixuzabivi.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/c11ab7c20c913.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/fRGrhd8/rakeporexowakup.pdfIn PDF document text
    • https://gososeru.weebly.com/uploads/1/3/4/5/134597059/8146416.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F06 5972 bytes
SHA-256: 9d4651cabd4f8f1a92782d7343c6ac9f25f7ee995e5c5a9fa7be586ab3e9d2ad
font_01_sfnt_off00012355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12355 10712 bytes
SHA-256: ae0cc39270f7b870ec51db7c45106a6cd8f728cc11cc68a5f002f7e4035abf4e

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