Malicious PDF — malware analysis report

Static analysis result for SHA-256 62653a5b373b4998…

MALICIOUS

PDF

85.3 KB Created: 2021-05-25 07:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a0231ef8bfa38498cae28e6e8366a60a SHA-1: 691838e647b36811c874bab56c5ad88fd1ecbf1b SHA-256: 62653a5b373b499895e1665148ca0f36235ffb1bf6b86ee33b5cd2eb84dfc171
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, directing users to various domains. The primary URL, https://jumiwimov.ru/strik?utm_term=convertisseur+chiffre+en+lettre+belgique, is flagged as a potential phishing or malware distribution point. ClamAV and ML classifiers also indicate maliciousness, consistent with a phishing or link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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=convertisseur+chiffre+en+lettre+belgique PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481173/normal_605d825986775.pdfIn PDF document text
    • https://tidovikazixuwuj.weebly.com/uploads/1/3/4/3/134316919/gufafatavegifononufo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464709/normal_5fe1b3c633796.pdfIn PDF document text
    • https://takatika.weebly.com/uploads/1/3/4/6/134605824/vupesaxokumodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422877/normal_60209f719d745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478398/normal_60362a5d3762d.pdfIn PDF document text
    • https://zizobisorodevu.weebly.com/uploads/1/3/5/9/135964877/4513273.pdfIn PDF document text
    • https://nojuguxupibubir.weebly.com/uploads/1/3/1/4/131438610/bifojajaxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421613/normal_5ffdf566c7f8e.pdfIn PDF document text
    • https://gixobuwek.weebly.com/uploads/1/3/2/8/132815317/02dda0a663f7.pdfIn PDF document text
    • https://zanolidades.weebly.com/uploads/1/3/2/6/132695759/8423833.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/38462781-5262-4347-b48e-b5d3b92f4cf3/wuduxomuroxiri.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/391077238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfafc4eb-8a04-4c28-908c-dfe5daf1af12/is_magic_chef_made_by_whirlpool.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/timivezufadosiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40afe26d-032d-41d4-bbfc-a41439880e6e/29244731788.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/wijuwupakajowajonijukikub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d4ad1d9-d41b-4a3f-a354-3ad33c5d6ccd/dojugukurukabatosak.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/31915508831.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/78381274624.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/menagerie_weapons_rune_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/94546115101.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/baumatic_electric_oven_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/99198388159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c41f0f-58bc-408d-8710-bca25d61a82c/honeywell_t8000c_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/64635502013.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_off00010a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A67 5164 bytes
SHA-256: 44e856a77feac1e298c5f970c1d1ed1d483c2381b73419e3f2af2f6fada6935c
font_01_sfnt_off00011c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C00 12764 bytes
SHA-256: 52d67a9087e32a1b73b6c71d31151a51c2cd4575a3a4b952f9b388117b385c27

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