Malicious PDF — malware analysis report

Static analysis result for SHA-256 85034959199a0dad…

MALICIOUS

PDF

71.8 KB Created: 2021-03-20 15:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3d802d5f5c5c88fe419df67a31f7e152 SHA-1: 5e0b33055ed3decaa9c4d463c056b133845fa3a2 SHA-256: 85034959199a0dad121d58a498a47e6dccdaad9e5299dda3d7d07f776d06d691
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://dugedepap.ru/strik?utm_term=sunbeam+heated+blanket+microplush+10+heat+settings+mushroom+full+-+bsm9kfs-r772-16a00 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444882/normal_5fd3233a9fc03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414342/normal_5fed7870c509f.pdfIn PDF document text
    • https://gegixigozazewit.weebly.com/uploads/1/3/4/8/134858275/girolifo_seputowakixaxib_xanejawiko_vepumebilajum.pdfIn PDF document text
    • https://gepajalubawif.weebly.com/uploads/1/3/5/3/135326746/4801365.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495846/normal_5fc72104432ce.pdfIn PDF document text
    • https://juvosibizojeguw.weebly.com/uploads/1/3/4/0/134040958/xagame_tulivofizuz_segovepit.pdfIn PDF document text
    • https://kaxawoxo.weebly.com/uploads/1/3/1/0/131070710/bogapuliroti.pdfIn PDF document text
    • https://rizowexerezo.weebly.com/uploads/1/3/4/2/134265486/e622756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_604a0ae8f2c2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_6018b2b963c21.pdfIn PDF document text
    • https://tonogedufeji.weebly.com/uploads/1/3/4/3/134378200/8467958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474218/normal_60494d03997de.pdfIn PDF document text
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/c9f48934fd9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_aefa960a6c5f41f98aa848e6481d4760.pdf?index=trueIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_d1d13a9f9613484da962f3dcd332db7a.pdf?index=trueIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_efb7104d6c2849a7880d74830b78f058.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pidufozu/31774449004.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/23426295796.pdfIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_b1c59c79386a4e1797063be645489f7e.pdf?index=trueIn 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_off0000d5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A6 6624 bytes
SHA-256: 56718658f7d30aac4133bb7fb427cb740b35ecc02e492ae4597dafe45b401d75
font_01_sfnt_off0000ec07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC07 10900 bytes
SHA-256: 1357f5da92630c6a0cbe2ce8e9e24860e076caf87366d93ecc7b46c4600b5921

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