Malicious PDF — malware analysis report

Static analysis result for SHA-256 2223bd38bc10e441…

MALICIOUS

PDF

77.3 KB Created: 2021-05-23 07:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6f0e910d87ef378f1423ef4359fc928c SHA-1: 608077aa40b16a9739c8431b95f4169ea853521c SHA-256: 2223bd38bc10e4415a71fd1bde95d8a45b800a40e2f4066bd3fa453f7a39d210
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' designed to host many PDFs. The primary malicious URL, 'https://baarspo.ru/strik', is likely used to redirect users to a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to exploit vulnerabilities or deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://baarspo.ru/strik?utm_term=what+is+the+goal+of+descriptive+research+strategy PDF link annotation
    • https://kominalekawer.weebly.com/uploads/1/3/1/6/131636772/bopakigovi.pdfIn PDF document text
    • https://pokenavij.weebly.com/uploads/1/3/4/8/134892290/4530273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486994/normal_606e79f9222b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fe2351e67bf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_600270262a318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390330/normal_6007ea8334bdb.pdfIn PDF document text
    • https://bizegesozuno.weebly.com/uploads/1/3/3/9/133997168/zotole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490936/normal_5fe89efeaea5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417216/normal_5ffa825921fb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426260/normal_606e6514edc08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_604d47da6766b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381738/normal_6064dd44e23af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460263/normal_5fdc3ebb29c92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366325/normal_6000ac0596f53.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/9c878327-6f13-4bdf-802d-379566f3ac17/66024480116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e363c99a-7bc6-426a-ac3a-71cfcab7097d/investing_all-in-one_for_dummies_for_dummies_business__personal_finance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040e8eaf-71e1-4fbe-b4a8-f8e51883fce5/2003_saturn_vue_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc385cc-4a1d-490c-803f-f6c383797d5a/what_is_the_synonym_of_progress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f51ca16e-27b0-48eb-9d7a-b73b8ac0b4ee/pretty_little_liars_the_perfectionists_season_1_episode_1_full_episode_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecfa3342-35ce-424b-a54b-3d27f0104b3c/83857671612.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_off0000f137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF137 5592 bytes
SHA-256: 8e3f7f4bafed4b8966df5cbb09b33271a4b41d5ffd7c2c44c561defdcb080ad6
font_01_sfnt_off00010452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 10436 bytes
SHA-256: b9e1680d3f947abf25136ed14cfaf940a46524ec15971b6c9504b194996864df

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