Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e199a5c02280716…

MALICIOUS

PDF

73.1 KB Created: 2021-03-22 00:27:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: df4983a686b20ed4096a1488a2f81241 SHA-1: b0f8e2a0f8e99731f10f1e1c44976ae1f4031bf1 SHA-256: 1e199a5c022807162d9094ad7e076e903df8809ae29faa4b9b42c3650482e258
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 0.9997

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://botokaw.ru/123?utm_term=chitta+punjabi+song+hd+video PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4391008/normal_600795b62b8ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496146/normal_600f80ca1236c.pdfIn PDF document text
    • https://vugosolisaxude.weebly.com/uploads/1/3/2/8/132814967/9739463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_6032a16916afd.pdfIn PDF document text
    • https://vekekugez.weebly.com/uploads/1/3/4/8/134883785/sopezovixojijomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470399/normal_60130623a18ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366676/normal_5ffd46d695072.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/how_to_tune_a_panasonic_tv_nz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_ef8121daff4c460f8ebf77dd7071abce.pdf?index=trueIn PDF document text
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_e6d0541c76084607b33863380d2946c2.pdf?index=trueIn PDF document text
    • http://wotidupodugi.myartsonline.com/tm-ac1900_rt-ac68u_difference.pdfIn PDF document text
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_da785193953a46d5b911f0ac1caaafad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/how_to_be_positive_thinking_in_life.pdfIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_51066ecfe0ed449298df2f3e5929429e.pdf?index=trueIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_67de23af89dd437a8bedb3a4ccc94fc3.pdf?index=trueIn PDF document text
    • http://kimawawasero.onlinewebshop.net/concurrence_monopolistique.pdfIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_a2da89fbe404490187a4b094506226b3.pdf?index=trueIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_cca6423a1898433dafa316e53a2bb848.pdf?index=trueIn PDF document text
    • https://235be7ff-9b22-41de-91df-7a9e5ced5199.filesusr.com/ugd/4fa465_067a7e0a08084fcf9b20ec6d445d46ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legesiliv/love_story_sheet_music_andy_williams.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC29 5276 bytes
SHA-256: d5ba121ed85de882df20dc6b57292c28572448eb61b94ced9fd8755606b6604d
font_01_sfnt_off0000de14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE14 10260 bytes
SHA-256: 1a2e77c4d66dae266d39cb9af453e2c691e959d8643226b6e8234857cfca2b01
font_02_sfnt_off0001017d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017D 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf