Malicious PDF — malware analysis report

Static analysis result for SHA-256 122d7fffe330009f…

MALICIOUS

PDF

81.2 KB Created: 2021-03-28 08:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 23348c040fc31e5ceb076e15bdc2cee4 SHA-1: 97e361f43f39c5933ef6fa44e89e4b55d3d3ca3b SHA-256: 122d7fffe330009f762f68f896a9afe24596905b94d0e6d478b957c2f3e81337
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by 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 0.9991

Heuristics 4

  • 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://vilenefex.ru/strik?utm_term=how+old+is+the+vitamix+5000 PDF link annotation
    • https://rediwugozuza.weebly.com/uploads/1/3/1/4/131438197/d54c38a0cc49.pdfIn PDF document text
    • http://lynciguest.com/toro_timecutter_ss5000_oil_filter46rn5.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/ziwejilawutugobaf.pdfIn PDF document text
    • http://discovljzg.fun/que_significa_titulo_salvage_en_estados_unidosf3xue.pdfIn PDF document text
    • http://medway24.com/tenozafujamakim6rwko.pdfIn PDF document text
    • http://moresukko.ru/bozazohtjwt.pdfIn PDF document text
    • https://kuwujuzavasikit.weebly.com/uploads/1/3/5/9/135985591/7189833.pdfIn PDF document text
    • http://sandiego-podcasts.com/dapogavulevuvopobozuxqt3w4.pdfIn PDF document text
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/jenotirajilevun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/adidas_uk_sizing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/68418849335.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/direct_car_insurance_app.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/meaning_of_balance_sheet_and_its_importance.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/ali_a_minecraft_texture_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/the_rock_song_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/149bc5c7-0393-46f7-a88a-e527460fa29d/1027219440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4bd138-3de2-46f4-8850-e398b8a15327/robew.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/kubavodotez.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/numakifaluragagupodalo.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/31962014026.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/cardiovascular_system_facts_and_information.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/what_does_it_mean_when_a_person_is_hollow.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/92259837402.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/employer_branding_plan_template.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 5416 bytes
SHA-256: 6060b781aaa315d2125e39b1cbe1356c2d636e4c5bca700554063cbfd9cdcc58
font_01_sfnt_off000111b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B6 10988 bytes
SHA-256: 001b1f6468c2ba6c90210880e7f50e8996cd275e1d573f937d769bc562711e55