Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b35c0ecd0c97ee…

MALICIOUS

PDF

70.4 KB Created: 2021-03-12 09:15:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4960cc1d1580ed0de0f4b09decbdc43f SHA-1: 5221973379ab45d456719e2080e6e7ef5d81d1a7 SHA-256: 19b35c0ecd0c97eec023bd7ed1559f2a0b03f046857e79ba51b0d0fb188dd617
156 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 5

  • 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.
  • 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://crophysi.ru/123?utm_term=rupinder+gandhi+the+gangster+2 PDF link annotation
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/d77ce6a0785f.pdfIn PDF document text
    • http://aycotoro5.xyz/why_do_they_use_knots_instead_of_mphmnxey.pdfIn PDF document text
    • https://wokulenazaxur.weebly.com/uploads/1/3/4/7/134744474/1182317.pdfIn PDF document text
    • https://ludiwutigavas.weebly.com/uploads/1/3/4/6/134697468/tidazarer-vebonowarux-pababuwumoj.pdfIn PDF document text
    • https://vizosajigu.weebly.com/uploads/1/3/1/3/131381839/6144091.pdfIn PDF document text
    • https://vaputonusodi.weebly.com/uploads/1/3/4/4/134493057/f0917a.pdfIn PDF document text
    • http://itdomen.fun/warm_bodies_full_movie_with_malay_subtitlesterwb.pdfIn PDF document text
    • http://look-hotel.com/what_is_mental_health_coachingqce48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xasovewipeje/how_to_fix_my_spalding_basketball_hoop.pdfIn PDF document text
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_9f5a8047ff1e472a808a4d90083e32f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/94016681842.pdfIn PDF document text
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_902cf7da95fc418fae1c4a6935f23d2c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figidireki/inventory_spreadsheet.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_5040d547eeb64925b0bad06149f6ca81.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/central_machinery_12_speed_production_drill_press.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/poxejasu.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/zewiwipe.pdfIn PDF document text
    • https://2a082fd4-e93f-4b8e-9e59-408fa046b31c.filesusr.com/ugd/e334dd_bbc0f63050154cbd9a87126688306f6a.pdf?index=trueIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_3281139e7a824a97ac1c6021c386e1a0.pdf?index=trueIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_7bf48bfab192468282ef24fb7b0d6e8d.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_off0000ca1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1D 5100 bytes
SHA-256: fa5826838c2d53af0f61b4ae83815d3a9cfb7fa8a129ac9fe21c8ff5d752cbaf
font_01_sfnt_off0000db5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5E 10272 bytes
SHA-256: d50496ca37776c1e6c475030d7b8990e2a1056f8a117f629ed934064bc77b8b4
font_02_sfnt_off0000fe92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE92 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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