Malicious PDF — malware analysis report

Static analysis result for SHA-256 798e58196deb0ba0…

MALICIOUS

PDF

65.6 KB Created: 2020-11-23 12:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 176f012c1a718473b815b53f3a523bd2 SHA-1: 174c41045f27de81da9d77b466f01123521c8027 SHA-256: 798e58196deb0ba0d8721c0b4a113eb0700f29b8c76062df94ca982e7958dec9
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document body and embedded URLs suggest a lure for downloading content, specifically a book, which is a common phishing tactic. The presence of multiple links to disposable hosting services further supports the malicious intent, likely to redirect users to malicious sites or download further stages.

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 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://traffnew.ru/strik?utm_term=the+power+of+habit+book+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404133/normal_5faa0040a5c95.pdfIn PDF document text
    • https://zekuwatifakaxi.weebly.com/uploads/1/3/2/8/132815855/gaxizi-juzonijuzimari-dutatatu-susavajewaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413566/normal_5f9fae7534767.pdfIn PDF document text
    • https://mesovozilepako.weebly.com/uploads/1/3/4/5/134588792/jigexenoposesuvosuda.pdfIn PDF document text
    • https://kileligujet.weebly.com/uploads/1/3/4/4/134457719/lemubowal.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/4aedcf6afc5.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/2936178.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/3250b5961ed1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f8772254426e.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/88b6af30-7a7d-4335-b6b0-35e3dc616205/bovuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27817acb-a6f3-4be5-be91-ba0dbca44520/25662787563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c06376-a900-43cc-a6bf-ae57db8c00b9/zenafirup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6E9 4984 bytes
SHA-256: 1ddc5753b47a0c7be2ec2c6ac67d9b5de23545facb691c732e90ca0c8f1ebe15
font_01_sfnt_off0000c7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D6 10356 bytes
SHA-256: 05c45be595558675168e76d4d0921d000174c77bb5d5f959ec800b79bc7e8a7e
font_02_sfnt_off0000eb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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