Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e962c2c4d30d91a…

MALICIOUS

PDF

75.7 KB Created: 2021-03-31 23:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9058eb6d545695200e16fc076c3b4b9d SHA-1: 98edc8b1fa27932a2b92ddfe6f153bab09f22083 SHA-256: 2e962c2c4d30d91a006358ce1e4832e682de5a4f704b2ca50c8dd4d6cdf61bf6
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 0.9989

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://lozipotod.ru/wix?keyword=idhu+namma+aalu+full+movie+online+tamilgun PDF link annotation
    • https://radifepibonavu.weebly.com/uploads/1/3/2/7/132712096/2840443.pdfIn PDF document text
    • http://mekomob.getenjoyment.net/understanding_blockchain_technology.pdfIn PDF document text
    • https://bewosugug.weebly.com/uploads/1/3/0/8/130814774/5196695.pdfIn PDF document text
    • https://binaxurekise.weebly.com/uploads/1/3/1/3/131381555/831146ebb.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/the_immortal_life_of_henrietta_lacks_chapter_2_questions_and_answers.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/13286371009.pdfIn PDF document text
    • https://suvewuvasalu.weebly.com/uploads/1/3/4/7/134762181/nawux-sorinufago-dalon.pdfIn PDF document text
    • https://nuduxojobiri.weebly.com/uploads/1/3/4/6/134629521/nebesaxelebeka.pdfIn PDF document text
    • https://tijuvenunulufuv.weebly.com/uploads/1/3/4/6/134625509/nebavafonoxigakobaf.pdfIn PDF document text
    • https://nekazexupogufeg.weebly.com/uploads/1/3/1/4/131454238/3305120.pdfIn PDF document text
    • http://rezolawanelu.sportsontheweb.net/activity_diagram_definition.pdfIn PDF document text
    • https://zamidagotef.weebly.com/uploads/1/3/1/4/131453459/binaposeri_jovititomigibi_jobedaruda.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/beatles_songbook_the_rubber_band.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/sukivu_vewifog_gefenuwa.pdfIn PDF document text
    • https://pizovepe.weebly.com/uploads/1/3/5/3/135323062/weveje.pdfIn PDF document text
    • https://takigufumugo.weebly.com/uploads/1/3/5/3/135345847/lifojuxeterul_jinibopijuxota_rukipitu.pdfIn PDF document text
    • https://womevelem.weebly.com/uploads/1/3/2/8/132814223/4285254.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc0c1f2-0a3f-42c3-87cb-684f2eb7b28e/dekaxej.pdfIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_1f4cb596658f435b8b8aacac82da6e66.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d137f0-03bc-4d62-bcd0-0ef39d461ac8/tigupetazuwoviferiwawi.pdfIn PDF document text
    • https://de2ee6d5-caaa-4265-b15c-40100ab77d99.filesusr.com/ugd/d43733_94123c8e694f4b6b86266fe0d96497d4.pdf?index=trueIn PDF document text
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_4811e40d1e094d41b348b85fbec7ef9b.pdf?index=trueIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_b67ca39eb190459fb118d735e015a400.pdf?index=trueIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_809590d1304141e7a521d74efb5a1b2f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE67 3812 bytes
SHA-256: b90a421033495ff54e54a26807b222d6c76b3311518b0e6ca0e57c3fd0dec9af
font_01_sfnt_off0000eabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 5044 bytes
SHA-256: 98560ea32d1499a21c01a9692c9d20638c64eb15c67156c8f1907488d344db1e
font_02_sfnt_off0000fbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD5 10320 bytes
SHA-256: 2d65e78e5881e60e80b6a6233f5ad7dd7ffb261a88ae63f4c2d7143cf6ecda4e