Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8fa2ab22eb6e060…

MALICIOUS

PDF

75.9 KB Created: 2021-03-11 12:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0c48d50e357bcb5952d153bb96f5a22c SHA-1: ec4dc0e666ab89e726543b1ad662b285b22c7b78 SHA-256: b8fa2ab22eb6e06082d804a8714a7b7245e3cb56cc11db952131ce8dd38c88d8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to drive traffic to a network of websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO spam. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics point towards a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://ponafet.ru/award?keyword=vertical+milling+machine+specification+pdf PDF link annotation
    • http://rexapeduke.66ghz.com/cold_rolled_steel_sheet_suppliers.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/gdjchfu/zombie_encounter_real_survival_shooter_3d_mod_apk.pdfIn PDF document text
    • http://xirixakexove.iblogger.org/north_coast_river_fishing_reports.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/fakumofigixiso.pdfIn PDF document text
    • http://basumoxivor.sportsontheweb.net/how_to_start_a_home_baking_business.pdfIn PDF document text
    • https://cdn.sqhk.co/rovukupovumo/dIigxij/adobe_audition_2017_bagas31.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/4iajbgj/53696055166.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/gjheBgc/korunuvedurapotatorira.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/32969361782.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/50_warm_white_outdoor_led_christmas_tree_lights_mini_5mm.pdfIn PDF document text
    • https://cdn.sqhk.co/gebunemif/6gh4XDc/cfosspeed_service_windows.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_a359a094480d440c9a16fd714c7cff50.pdf?index=trueIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_c81387bd3e3142d9917d01e0e2f3a0eb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/bejisewemijuvakigefa.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/45282003731.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/icann_registrar_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/juki_sewing_machine_ddl-5550_price_in_saudi_arabia.pdfIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_78505bd63f864a07ae4bd7380403de42.pdf?index=trueIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_b19c1f5f197a4c11bc0b57c03945a999.pdf?index=trueIn PDF document text
    • http://vusogibudikag.rf.gd/35468515388.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/piduxalimasexamawumo.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/5925506961.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/mibapifinolujiwupe.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_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 5532 bytes
SHA-256: a0aaff579f759daeefee4c7c9eb081c63bdfeacd49578e3eaa6ae0fdb0446442
font_01_sfnt_off0000f347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF347 15092 bytes
SHA-256: 0e446b5e95012d773c57d59a6c4d91b202e964bd4e6b0643c25cdcf5821e58f2

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