Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1047414e2b30c7…

MALICIOUS

PDF

86.6 KB Created: 2021-05-27 17:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0317f1b06d5eee24e9266120936c8b7c SHA-1: 83547405300311e5848838032ad14acc8f5fd33a SHA-256: 4d1047414e2b30c7a0c970b363ccfeacf41b7a66fa1b14dc4255e3a70c702bb9
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to various PDF documents hosted on disposable domains, a common tactic for SEO manipulation or distributing malicious content. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lure users to malicious content, potentially via a phishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wb?keyword=is%20forrest%20fenn%20dead PDF link annotation
    • https://rogakaroguw.weebly.com/uploads/1/3/4/5/134517982/63ed03c8e046.pdfIn PDF document text
    • https://sibanixo.weebly.com/uploads/1/3/1/3/131380297/pasedikiwevukez_watixoge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411219/normal_5fe38870b5c49.pdfIn PDF document text
    • https://towelekuw.weebly.com/uploads/1/3/1/4/131406253/1b4094.pdfIn PDF document text
    • https://xakolino.weebly.com/uploads/1/3/1/4/131453712/kinokamunase.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408324/normal_5fc78f8495592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444371/normal_601110bd9da91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451376/normal_6043dfd1e59d2.pdfIn PDF document text
    • https://bezujopejot.weebly.com/uploads/1/3/1/6/131606295/76980d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_601ba5e8bfea7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5fda2d34e4d77.pdfIn PDF document text
    • https://vudulami.weebly.com/uploads/1/3/5/9/135964857/kopukonifirupixepeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476925/normal_606c3c158b9b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369926/normal_5fc76a59d49a6.pdfIn PDF document text
    • https://gebomatera.weebly.com/uploads/1/3/5/3/135396668/2ba096cbced.pdfIn PDF document text
    • https://pebuwopaduve.weebly.com/uploads/1/3/4/8/134853156/gaxenarabujumup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_600bf19782955.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/65d1c246-1f54-4bfe-a736-9f2c8667e419/fender_hot_rod_deluxe_iii_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aab3ca8d-f319-44ab-8114-b717b7a808b0/12926756121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd1e65f-ac77-443c-bdf7-defb42b3c0b1/9749225050.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF220 4548 bytes
SHA-256: 6a3b3564e509a3bd231b1ebf6f0d5d3db93ed5a9024b4e1503347b232953fa72
font_01_sfnt_off0001018b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018B 11516 bytes
SHA-256: 08d700bea10b4bf32497a82544e1e3fad2ad8e240531f525c560214fd84530a9
font_02_sfnt_off00012910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12910 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1
font_03_sfnt_off00013d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D78 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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