Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbea6f7b2f4b8b17…

MALICIOUS

PDF

72.0 KB Created: 2021-06-02 10:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 249609f772baeaf44b5162efc2575f6b SHA-1: 182bf60d795e8eb5bb0ed2913d7b56f05e7c168d SHA-256: cbea6f7b2f4b8b17e084349cfe0eb399a86debbd8b84077af81f153a706572bd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The embedded document body, though heavily obfuscated, appears to be a lure related to a 'Glow worm betacom 24 manual'. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://archism.ru/pbw?utm_term=glow+worm+betacom+24+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459776/normal_602f83e1296fa.pdfIn PDF document text
    • https://xokosawebajufad.weebly.com/uploads/1/3/0/7/130776850/bakaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452377/normal_5fe7557edc8e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_60565d8015c9b.pdfIn PDF document text
    • https://zeposonuvijuz.weebly.com/uploads/1/3/4/7/134702940/nojixenobaxusol.pdfIn PDF document text
    • https://wawuzaxuluzu.weebly.com/uploads/1/3/7/5/137508639/gilado_mowijefab_bepatubibe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_602247207734d.pdfIn PDF document text
    • https://jumedewumeba.weebly.com/uploads/1/3/4/3/134310957/c367669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373527/normal_5fdd7c081535f.pdfIn PDF document text
    • https://lemabifi.weebly.com/uploads/1/3/4/3/134319461/getalu.pdfIn PDF document text
    • https://fonabanobegax.weebly.com/uploads/1/3/1/6/131636781/didesew.pdfIn PDF document text
    • https://naluzamuro.weebly.com/uploads/1/3/4/5/134516405/65992f2a1.pdfIn PDF document text
    • https://zomifotanive.weebly.com/uploads/1/3/4/5/134510562/9884802.pdfIn PDF document text
    • https://nilezejexi.weebly.com/uploads/1/3/4/7/134737846/5311009.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445103/normal_5ffc307bcf99c.pdfIn PDF document text
    • https://xovobinawulum.weebly.com/uploads/1/3/4/8/134883327/baf515c69dd1ac.pdfIn PDF document text
    • https://wuwawumakilur.weebly.com/uploads/1/3/4/8/134875279/jimifujatisub-devej-midiwevumetija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5fea062518b63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408721/normal_5fcaa58e74093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_60675f348a7df.pdfIn PDF document text
    • https://dotejapu.weebly.com/uploads/1/3/4/0/134042906/23eea0d92087c64.pdfIn PDF document text
    • https://pedugosiv.weebly.com/uploads/1/3/4/6/134622687/vazuvatemube.pdfIn PDF document text
    • https://vesifumami.weebly.com/uploads/1/3/5/2/135294942/tomemi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bebe8b0-778a-48a3-b23b-daddca4f9aa1/2008_dodge_avenger_pcm_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5f3631-2627-43db-8344-a0af73917577/how_to_get_marketplace_icon_on_new_facebook_account.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_off0000dbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB8 5248 bytes
SHA-256: 3b2d3c39625c8ffddc04813adbe56562c4d8222cc23e7841c974e196ee2ee360
font_01_sfnt_off0000ed99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED99 10820 bytes
SHA-256: 9aece62812ac51ca37f92f8a71376d20930d851183a08fe7d8b09e5515711aad

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