Malicious PDF — malware analysis report

Static analysis result for SHA-256 334cd5e9ff9bcf39…

MALICIOUS

PDF

72.7 KB Created: 2021-03-15 00:17:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e9b8bd01ac16bb69332e68dbf17edeb7 SHA-1: b051f34639cf7cbe97afb8589eb54d2b1186ce23 SHA-256: 334cd5e9ff9bcf395e77e5012a568db908a23ba674dd41effd672cbb590f7b22
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to a suspicious domain 'soxebez.ru'. Heuristics indicate a link farm and potential SEO spam, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/strik?utm_term=how+to+program+remote+samsung+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390643/normal_600cac66a0bc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420748/normal_60132729de495.pdfIn PDF document text
    • https://nagagixibedixu.weebly.com/uploads/1/3/1/6/131606435/sovezeripad.pdfIn PDF document text
    • https://wegudogixudefup.weebly.com/uploads/1/3/1/4/131438345/251666.pdfIn PDF document text
    • https://pejizaki.weebly.com/uploads/1/3/1/4/131437091/6643695.pdfIn PDF document text
    • https://pukegivox.weebly.com/uploads/1/3/1/8/131856392/3f8164a076.pdfIn PDF document text
    • https://nowiwadigomu.weebly.com/uploads/1/3/4/0/134018048/21385fd28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_b868e743090f4362b20aba97088da807.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba56a73f-15c8-4cba-84a1-9cfda4de147c/98396884170.pdfIn PDF document text
    • https://95a83a18-022f-4aa5-9dc2-588eac4c5c4a.filesusr.com/ugd/ccb6ab_ac1e3660cf2f4708addfe22ed369b790.pdf?index=trueIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_51bf1a0da43e4eee86c9252f3b3a225e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/68111229681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ddaadb5-5e58-4493-95e4-cbc79eff13b4/2942879738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e109225a-25ce-4e5c-8c43-05ef295be234/55421590801.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/84250793310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4977383d-5da1-44ed-a19e-e466cdd4aefc/86660326772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df598735-def2-47c6-b0ca-375f2389defc/brother_p_touch_900w.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/protein_structure_analysis_in_bioinformatics.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/gifupanemez.pdfIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_f4d9fb787e10425bb46bea6edda1fb6e.pdf?index=trueIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_42512f5f2b3b41a1a00873d1ac0d79a2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/39854554462.pdfIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_93a566083a2a44adb33b7fdbceff8283.pdf?index=trueIn PDF document text
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_1c49297896b14bec9fbfc2dc7a52515b.pdf?index=trueIn 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_off0000e053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE053 5220 bytes
SHA-256: 430229d37e40c777f22f029be020a34c00276551ba4d47c6cce3527adcbbc0ee
font_01_sfnt_off0000f21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21B 10224 bytes
SHA-256: 6319d6228b047dd4b618ea612490066cb855bb396fc7890b2d0b238e3987420a

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