Malicious PDF — malware analysis report

Static analysis result for SHA-256 92323cce552a7aa0…

MALICIOUS

PDF

77.8 KB Created: 2021-04-03 10:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 54ee54aabf9c085bcafedac537720adf SHA-1: 3ec2b7588219aae333cbb696aed598741f6ef7e0 SHA-256: 92323cce552a7aa09748cea5382731a7507a34b6e1e935bef9badd56c1640b24
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=cuisinart+coffee+on+demand+tma+12+cup+coffeemaker+manual PDF link annotation
    • https://cdn.sqhk.co/babonisu/4jfd1hi/the_zombies_she_s_not_there_lyrics_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/daladovum/hZhlhhb/balenciaga_triple_s_white_womens_39.pdfIn PDF document text
    • http://bivoliku.mywebcommunity.org/adolescent_health_education.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/brainstorming_en_francais.pdfIn PDF document text
    • https://cdn.sqhk.co/bogebumemilo/5gdvnjd/zopozizidijowinox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495271/normal_6046709a308b1.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/criterios_cetoacidosis_diabetica_pediatria.pdfIn PDF document text
    • https://cdn.sqhk.co/nimotixalulo/iBpVjfo/73230425566.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/ten_knowledge_areas_of_project_management.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_600ac5b007e67.pdfIn PDF document text
    • https://cdn.sqhk.co/gojapawareke/hejejcX/rumipitokezajot.pdfIn PDF document text
    • https://cdn.sqhk.co/tejikeluz/igitghJ/kozilijuwoxefikatuwimose.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/g4Qiijg/43255676129.pdfIn PDF document text
    • http://xalapuzim.sportsontheweb.net/lean_bulking_diet_plan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417528/normal_6020272a6ad17.pdfIn PDF document text
    • http://gonalotuturopil.mywebcommunity.org/you_can_win_book_review.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/Wibjehb/25147617273.pdfIn PDF document text
    • https://cdn.sqhk.co/mekibekowufe/O7ihGhg/to_do_list_examples_excel_cell.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/pasawe/gimafoweluzewevapor.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/bopoxolavopixita.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/tinker_island_mod_apk_1._4._32.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/digital_economy_act_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/how_to_start_a_remote_control_helicopter.pdfIn PDF document text
    • http://napamewa.atwebpages.com/ancient_greek_language_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/segolurixujimidewubar.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_off0000f25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25E 5452 bytes
SHA-256: adcf735951c34bb1c33a3d2e071e924a32a25fc4d00867a7725b004b70494543
font_01_sfnt_off000104dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DC 10704 bytes
SHA-256: cabb7b48ff7370c8c26d561867db30ba2a2fec5d6817ce142348e111ab529392