Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc34d693c8c8624…

MALICIOUS

PDF

78.2 KB Created: 2021-03-14 08:54:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 26fcdf8f211555280fa23652314f2dc9 SHA-1: 9fba344bd93849154661f99ad117143face5398c SHA-256: 7cc34d693c8c8624fb3ae62dface753a26e7c9ba21cf8b95c8dcff7d2508ed48
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 0.9997

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://ponafet.ru/123?utm_term=transformers+barricade+mustang PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458852/normal_5fdca34928a12.pdfIn PDF document text
    • https://matigolexa.weebly.com/uploads/1/3/2/6/132682665/povodomujorev_molinetifona.pdfIn PDF document text
    • https://wedoweniwan.weebly.com/uploads/1/3/5/3/135308992/6430240.pdfIn PDF document text
    • https://mulunumidivopiz.weebly.com/uploads/1/3/5/3/135393794/4665058.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417024/normal_5ffc479500b82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499341/normal_602928ae7e250.pdfIn PDF document text
    • https://xevowuzari.weebly.com/uploads/1/3/1/4/131437308/101162e55d98454.pdfIn PDF document text
    • https://favaruzikab.weebly.com/uploads/1/3/4/8/134871436/gerojobi_vomikaja_vuzasuvajuweteb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408481/normal_6007b948de667.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/xukaguwo-ninikodudeke-bogax.pdfIn PDF document text
    • https://cdn.sqhk.co/samanugutu/h3heihL/83876347152.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490244/normal_6008a8f61b04e.pdfIn PDF document text
    • https://cdn.sqhk.co/zigotimuti/hem9jd7/97044221641.pdfIn PDF document text
    • https://vagofavom.weebly.com/uploads/1/3/4/4/134486407/f748a1754d16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kefujaforu.rf.gd/marriott_bonvoy_app_android.pdfIn PDF document text
    • http://wamunezufim.rf.gd/fumegilagolasop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adddb3ba-de29-48df-b453-0b982d209de4/icom_ah-4_loop_antenna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f55c5b-b62f-443b-afe4-9e83d7cdd3cd/68344688989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8474e67d-10a6-4f5b-948d-f90be49378a4/edgestar_ice_maker_ib450ss_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9cb3281-c677-43d8-b196-6825eb6f6b17/warm_up_exercises_for_seniors_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487ef4b4-5430-4c8b-b6d2-1b00811d858a/world_political_map_outline_free_download.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_off0000f10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10B 5396 bytes
SHA-256: e31c270c677fd4e9435c90761c0976c2c3069391b29adfcedc21402e8a927fcf
font_01_sfnt_off0001034b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034B 11984 bytes
SHA-256: 1eb9f279e79d84233ce2d244b1ded88422fec842b76e6131b5f70bd87f17711f

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