Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62c40e6aca3e2a5…

MALICIOUS

PDF

83.0 KB Created: 2021-05-30 16:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a8cb5deef3dcff32b1629d0172563248 SHA-1: 10910040702465b66db4f0dc0812e62d799958f9 SHA-256: f62c40e6aca3e2a51ad78601266d5bc9640549908ed2ae2f9e8428fbea58d4ab
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable domains, indicating it is part of a link farm. The primary URL, 'https://lozipotod.ru/strik?utm_term=bridesmaids+movie+poop+scene', suggests a lure to attract traffic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam.

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://lozipotod.ru/strik?utm_term=bridesmaids+movie+poop+scene PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478664/normal_606605bb70cfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482020/normal_606e55b776a7a.pdfIn PDF document text
    • https://zotadipijipas.weebly.com/uploads/1/3/4/4/134467791/2360416.pdfIn PDF document text
    • https://bujubupe.weebly.com/uploads/1/3/1/4/131437121/xilobejobegasan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497346/normal_5ff046a0600c1.pdfIn PDF document text
    • https://linizudozurori.weebly.com/uploads/1/3/4/6/134640128/totejegotefasu_nedelukesilimo_rewaj.pdfIn PDF document text
    • https://mikovenib.weebly.com/uploads/1/3/0/8/130813447/5960866.pdfIn PDF document text
    • https://buvokatawun.weebly.com/uploads/1/3/1/3/131378806/tesogel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490371/normal_606e678dd58d3.pdfIn PDF document text
    • https://lemosipezo.weebly.com/uploads/1/3/5/3/135326275/pipajuvoge.pdfIn PDF document text
    • https://nunugaborunis.weebly.com/uploads/1/3/1/4/131437119/bewap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465935/normal_5fcf0c65e87a6.pdfIn PDF document text
    • https://dusimajigedavim.weebly.com/uploads/1/3/1/4/131453199/e4af66b7ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383915/normal_600b39cbce5d9.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/b599e11c-3a83-4b4e-a0b3-a04bd53441ea/83318840294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d68c5d8-439e-4ff9-8570-22f685a8b49c/xuxupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e3c01f-04d9-43ce-9e7f-fc52bc1040ee/64307322499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a97ba33-71f9-4810-b1a3-f9b8176a6617/biodigital_human_apk_premium.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_off000104b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B9 5296 bytes
SHA-256: 23ac4839c85cb6240e0b4190bb6b64549d12f398e2a288694d7c1845954de4b7
font_01_sfnt_off000116ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AE 11628 bytes
SHA-256: 07f4d83e643921d6621ea91b8fd54e8c1e2db41c25fe905e8b17694343a29e04

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