Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e6c70220d1dffa…

MALICIOUS

PDF

72.4 KB Created: 2021-05-30 06:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7235cfe2c2864b0f9672b1e09f11e693 SHA-1: 58d50e6dded17e388d19be0420902d9cbb3ef554 SHA-256: 26e6c70220d1dffaae3eff2f46d1b37add63f51663846c14a40ed8ff9f9f731a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on various platforms, indicative of a link farm or SEO poisoning tactic. The primary URL, https://jumiwimov.ru/strik, is likely a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest malicious intent, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=how+to+draw+imagination+spongebob PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387709/normal_601b844dcee35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426263/normal_601842efb7840.pdfIn PDF document text
    • https://bofezukidev.weebly.com/uploads/1/3/4/4/134464138/9011091.pdfIn PDF document text
    • https://nusuxedusikuj.weebly.com/uploads/1/3/4/6/134620646/182eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469841/normal_5fdebba1b3ee5.pdfIn PDF document text
    • https://makodute.weebly.com/uploads/1/3/4/6/134649936/sesup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366034/normal_5fefc8d000bf3.pdfIn PDF document text
    • https://karupijelajedo.weebly.com/uploads/1/3/4/8/134878973/8061520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482854/normal_603541de13b54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383804/normal_600922798bea6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_60501c148d9c2.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/7750d56c-9166-498f-80f7-7ad685f3b849/what_does_f10_mean_on_my_kenmore_stove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8ab36d-3e6f-4834-a82b-d820774f7df1/60782357943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2041f2b-1e89-49eb-add0-cf24f67faea5/92695200967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b9eae9-85f3-437a-b9d0-1dc4070d79d0/7540162055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25bdd5d5-3b44-46dc-8c5e-d85520d3f8f4/does_cornstarch_have_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe544f5-28c1-4cd3-96b8-0af62285098c/california_real_estate_license_exam_prep.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA4 5440 bytes
SHA-256: 065a972aeb4ee4ff6f632773440146f64aebadd04718bf5ea3a1359bccd73d99
font_01_sfnt_off0000f217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF217 10324 bytes
SHA-256: f9a9dc3d1710d71c13fc249c63a2abb84198800944319dde2502692d44c05c07

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