Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb201aeafb2f17b4…

MALICIOUS

PDF

76.3 KB Created: 2021-03-21 00:39:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0ae9476d9adf2543e80ad0fdc99635df SHA-1: b00f059be590bb71c1402359603c3a5ab4f4bc8a SHA-256: fb201aeafb2f17b4d6d0e5b7074ddcd2c195a715e0f2b6e18a35381679ba458f
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 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=unblocked+games+boxhead+2play PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482853/normal_60496ab01ab4f.pdfIn PDF document text
    • http://dokumenty-kiev.online/fantastic_vent_33505k7pv.pdfIn PDF document text
    • https://nimivisedasefu.weebly.com/uploads/1/3/1/0/131070972/e9c3bf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_604802f4d28e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443624/normal_60502378f24f7.pdfIn PDF document text
    • http://kersita.space/tugisid0e9y1.pdfIn PDF document text
    • https://rosexanovetaw.weebly.com/uploads/1/3/0/8/130814227/zuvepozon_ranaran.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401558/normal_6041e427861a6.pdfIn PDF document text
    • https://daxekofaji.weebly.com/uploads/1/3/1/6/131606395/sotiniwimur.pdfIn PDF document text
    • https://ropujumidud.weebly.com/uploads/1/3/1/4/131406541/0cb4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_60493fab76dca.pdfIn PDF document text
    • https://wugizagopa.weebly.com/uploads/1/3/5/3/135311922/bekovipulala.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_0f588b5bb08846d6bbee42a866435e17.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusixa/lexisnexis_personal_report_cost.pdfIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_aa77dbf40c204859ae3ae86746a65577.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e05d104d-610b-40f7-8344-88518d2ee3cd/do_you_capitalize_mother_nature.pdfIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_d575ce569d6149599ff29e0699056ae8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/busadana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/172f6dc5-3fee-4fa6-8626-789f17a72aca/11221068691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d60d3f45-3aea-4c1a-9224-8ffccb9585e0/my_toshiba_laptop_wont_turn_on_or_charge.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/43149822574.pdfIn PDF document text
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_56762298cb4c4b6da24c4352499438a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/guitar_sheet_music_pop_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/86697447062.pdfIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_2ed660cb295048d0b76533c756cae072.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_off0000e926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE926 5888 bytes
SHA-256: ef0c5481c549bbf25d6e5d0a129b7a4ffcb732e65d39a8e6ce9495ed519216a5
font_01_sfnt_off0000fd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1A 11080 bytes
SHA-256: 116fb6f372dacbf1ad9186a2556d099b30e3908a3ee233dba5d001bb4c71698c