Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e94fb7216c507b0…

MALICIOUS

PDF

89.9 KB Created: 2021-03-10 10:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: af706e6a6410a400cc97eecb6119ce0d SHA-1: 93cc878b33fa9ef866de92156ae78984ef655aa8 SHA-256: 2e94fb7216c507b061f1cf6f2cacda3c7aece32054fa0593a9e9f8bb1fd8c650
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9988

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 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://xajibur.ru/strik?utm_term=crazy+love+dvd+study+guide PDF link annotation
    • http://tivewuba.iblogger.org/susagabupunugolezotelad.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/vuxagurilor.pdfIn PDF document text
    • http://mipedinujit.22web.org/wixonaxalabi.pdfIn PDF document text
    • https://seruborakumew.weebly.com/uploads/1/3/4/8/134849990/mexofakijivo.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/how_do_you_calculate_number_of_years_in_compound_interest.pdfIn PDF document text
    • https://junovolosexev.weebly.com/uploads/1/3/4/4/134467690/bedab01.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/tetifakot_gizodotosanupo.pdfIn PDF document text
    • https://votadewigul.weebly.com/uploads/1/3/0/7/130775387/zoduze.pdfIn PDF document text
    • http://nizozipup.22web.org/84503748868.pdfIn PDF document text
    • https://xovadodelemowuz.weebly.com/uploads/1/3/1/3/131383330/1746188.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://uploads.strikinglycdn.com/files/22c3e045-2f6a-494d-8549-f6eebbc4340a/what_does_the_monster_symbolise_in_a_monster_calls.pdfIn PDF document text
    • http://tuzuvas.rf.gd/number_line_to_10_000_worksheet.pdfIn PDF document text
    • http://semerobaragizeg.epizy.com/88237698519.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/gojif.pdfIn PDF document text
    • http://gujugune.rf.gd/the_green_inferno_imdb_parents_guide.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/how_to_reset_combination_lock_on_briefcase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e9f1a6-795c-4d96-8a21-cebcad037c15/logical_venn_diagrams_questions_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/wizexezokajirelireluv.pdfIn PDF document text
    • http://purokamutene.rf.gd/keurig_b145_office_pro_descale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93795b6a-19c2-4bec-9884-8be4fe533cc4/free_download_rpg_maker_vx_ace_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/why_do_i_have_a_painful_bump_on_my_scalp.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/48011284225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4085517-3b4c-47ff-b27a-25e0fa89317a/bibumujozigivixaradowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40aba7da-c2c7-4fb6-bdf4-9ca1fd2e6e88/13758665403.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B3 5004 bytes
SHA-256: a573fb8ba51eaac60698e7f31f78f0bbcec213937c2afd0ed9395e99a1cf1fc0
font_01_sfnt_off000126e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E8 11344 bytes
SHA-256: 0e31133f5915b06088d49f847b601a8a3e321b0c456b4e554a20142b25eb069f
font_02_sfnt_off00014c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C2C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176