Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da0096f4f4a2a4a…

MALICIOUS

PDF

90.3 KB Created: 2021-05-01 19:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: efeceb83736cdc06d1dcd11e2f551146 SHA-1: a8f56d28be5e276637a5c30f241dcaf5736e700f SHA-256: 0da0096f4f4a2a4a968cd7ff883156594e8de431669d45065398a24e5a3caa96
186 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 high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with one prominent URL being `https://nipisod.ru/strik?utm_term=toro+power+clear+721+e+oil+check`. The presence of a link farm suggests the document is designed to lure users to potentially malicious websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=toro+power+clear+721+e+oil+check PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405651/normal_5fd94e210c91d.pdfIn PDF document text
    • http://narixuz.mypressonline.com/76765044434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_606238b1d470a.pdfIn PDF document text
    • http://noxepometiv.iblogger.org/french_english_translation_dictionary.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/trumpet_scales_finger_chart.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/botnica_livro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_6035092ae48e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d2d110b1-dce0-4b0c-bed7-be24280b7a6e.filesusr.com/ugd/165585_17b134b5fe2641bc888add68c6d5e7e6.pdf?index=trueIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_36886f05731342fcac8c7d741bef8e24.pdf?index=trueIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_7fadd8288dc142428ba8f1de8cac634a.pdf?index=trueIn PDF document text
    • http://pubodetag.rf.gd/22939139411.pdfIn PDF document text
    • http://misukejijixuke.epizy.com/courage_to_grow_album.pdfIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_1ed01b6128e44798bbbd87a880c3bcf2.pdf?index=trueIn PDF document text
    • http://lepamiruketujuf.epizy.com/asap_mob_cozy_tapes_2_album.pdfIn PDF document text
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_df0a04b107fa4fa894865dbbd95734e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a0665d-4f5e-440e-b006-c0aba9ab6ac9/how_to_build_a_wooden_mallet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cadcb67-887f-488b-87a3-866c8fe1f776/how_to_write_a_business_plan_for_a_cake_decorator.pdfIn PDF document text
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_385671584983487bb189eac9374dc010.pdf?index=trueIn PDF document text
    • http://zodomufofojijil.rf.gd/ripuban.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_off00011815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11815 5212 bytes
SHA-256: 26dc049718a111873f11e08d4c4049b96f6cf835922f1ae8dbde39517700169e
font_01_sfnt_off000129e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E2 2276 bytes
SHA-256: 18721ddd90dda8e35b443e7b3e87a4de385f64a76c9fef7f48a348b3b43aa5db
font_02_sfnt_off000133cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CC 11804 bytes
SHA-256: 3b17e0b16467a6d939e4381713b1b4391b1182c86a12641323ed6910bfb0d18e