Malicious PDF — malware analysis report

Static analysis result for SHA-256 7612f06a4173a94c…

MALICIOUS

PDF

62.5 KB Created: 2020-11-20 03:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1c4f85f9aa1674c218c7cdd0072c3e55 SHA-1: 9196fa3a99cb7129189113a23e7a8f6b47367f48 SHA-256: 7612f06a4173a94c55eaaa949fa15c1964748fd7a3e6a82a553cc2dc07da52ea
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=speed+hack+roblox+booga+booga In PDF document text
    • https://gozozogedabasiw.weebly.com/uploads/1/3/4/3/134321967/8529051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392857/normal_5fa783fa69f23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416659/normal_5f9612c929946.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378425/normal_5f9f66a43743f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376629/normal_5f8a883142496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_5fa6558ec5691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393364/normal_5fa8a389d8e82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f98cc1ef0eb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383680/normal_5f91a44768fe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381740/normal_5fad26fc2c226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_5fa8713181c14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4f92980b-ba41-4b42-b57b-6e408c9abf85/libonivunawabawimaboma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b452aed7-b372-48b5-9ae6-f83103430700/pennswoods_classifieds_shotguns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa8d1038-f28b-4379-948d-5f2d650badac/98822057885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acf87400-b64b-4ef6-bc41-a5a04f6f7c95/loragap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF33 5088 bytes
SHA-256: 41068bf4f4ee27255c3c5887ad73d93feaff1680d21f1beb6a858ec8fddaac2c
font_01_sfnt_off0000c082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC082 8868 bytes
SHA-256: 5fbbbd2120c88a546c7445a0a91cfb5bb804404c70fa77240830815b9caf3149
font_02_sfnt_off0000dedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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