Malicious PDF — malware analysis report

Static analysis result for SHA-256 0169471d01309b8c…

MALICIOUS

PDF

79.3 KB Created: 2021-03-22 10:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2c28e95cb1d2afc29a7f30cbf5c7ef18 SHA-1: dd5f6a7abd4ff90ad7e8786f3b860a924133b070 SHA-256: 0169471d01309b8cbfc6b6c6b316104b9b9c5bbaa3c82534a46cbbd099a00576
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://golowaki.ru/strik?utm_term=lexus+rx+350+hybrid+2021+price PDF link annotation
    • https://pepevifive.weebly.com/uploads/1/3/4/4/134480859/vumeni-ledozu-bokojepogewazil-ruvaresogo.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/de394.pdfIn PDF document text
    • https://sawolopu.weebly.com/uploads/1/3/6/0/136049845/1201c56b99bc9fa.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/ed5decace0897.pdfIn PDF document text
    • https://betixajivuf.weebly.com/uploads/1/3/4/9/134900014/7087754.pdfIn PDF document text
    • https://kegewibenufugix.weebly.com/uploads/1/3/2/6/132682471/6028556.pdfIn PDF document text
    • https://tewukowil.weebly.com/uploads/1/3/2/7/132741555/6615855.pdfIn PDF document text
    • https://reratedazakowim.weebly.com/uploads/1/3/1/3/131378897/pupigogidob.pdfIn PDF document text
    • https://zajuzazoni.weebly.com/uploads/1/3/4/8/134891144/zodapegofetafogofow.pdfIn PDF document text
    • http://nepifumawal.22web.org/cambridge_primary_science_stage_3_teacher_s_resource.pdfIn PDF document text
    • https://pegalidaxib.weebly.com/uploads/1/3/4/6/134632492/3912087.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_881cf24f00bf4419b766eb514c37cb77.pdf?index=trueIn PDF document text
    • http://fupemewutedijux.epizy.com/puzzle_page_crossword_clue_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe9d60a7-b83e-476e-808d-104b1f35fc01/towukix.pdfIn PDF document text
    • http://tivusanezidiv.rf.gd/plantronics_backbeat_go_3_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7faee43c-f0d4-47eb-9370-f2069f60f1ff/is_roborock_worth_it.pdfIn PDF document text
    • http://bexawiturefu.epizy.com/4940601803.pdfIn PDF document text
    • https://2178e3ec-2e0a-46e0-af35-d8a6fdfeb21a.filesusr.com/ugd/c411cf_d640e088a7ea40f4aa658de3a6435107.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f04decfc-092e-45b8-9775-dfeb9f625e5f/brother_p-touch_h100r_tape.pdfIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_d263cff87c524903b2bf1d6549b4c265.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ffcd989-3edb-497f-b555-d0de5ebfc49b/10589474080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc52fc09-32d9-42e3-9bf8-f13d31e4d261/hp_6500_wireless_printer_ink_cartridges.pdfIn PDF document text
    • https://b998fa74-583e-446a-a2a7-67f41460fdb2.filesusr.com/ugd/e081f8_8358a951e9994092a4a17736d2d8d7f0.pdf?index=trueIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_e558d186405d4786b08d0355a8d0bbe3.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_off0000f779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF779 5784 bytes
SHA-256: 23ce6cad6f7c48efc57b29a1166503d785ef02634a020a31b6b56adfe5f41015
font_01_sfnt_off00010b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B38 10644 bytes
SHA-256: 25831e65cef60e9e22a6804a59a27e927b5e0ec5f65fbc451e63f387a33e2426