Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e71180d100f8f7…

MALICIOUS

PDF

74.5 KB Created: 2021-02-16 03:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6cef4a3c6e67e0de949f11b859e15efd SHA-1: 443ab22dd62a748c69622ab30ba548b1d59f7f78 SHA-256: 42e71180d100f8f7fdb7b0b33172693e725290f8696acbc0324d773dc27bb096
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary suspicious URL identified as a redirector likely leading to a phishing or malware download site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=how+do+i+love+thee+critical+analysis+pdf PDF link annotation
    • http://czecheducation.space/healthy_carrot_cake_recipe_sugar_freebs6ru.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/jbBXhao/defender_car_old.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/3cc4d4e94af9a6.pdfIn PDF document text
    • http://romomikas.22web.org/lineage_2_high_five_lvl_guide.pdfIn PDF document text
    • https://damanula.weebly.com/uploads/1/3/1/8/131856109/7276193.pdfIn PDF document text
    • http://maruwikugob.iblogger.org/roteiro_de_cerimonial_para_formatura_infantil.pdfIn PDF document text
    • https://cdn.sqhk.co/razilipot/d1jeggW/who_got_man_booker_international_prize.pdfIn PDF document text
    • http://medicinfo.online/fiche_technique_ascenseur_otisz1xg8.pdfIn PDF document text
    • https://cdn.sqhk.co/gizivapejoko/hCgfgig/amazon_prime_customer_service.pdfIn PDF document text
    • http://cardio-natural.info/43504102022dzuds.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/wisuw/puwasu.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/assistant_regulatory_reporting_accountant.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/zorubijokivijibifax.pdfIn PDF document text
    • http://winigoset.rf.gd/afunika_nakulalolela_video_mp4.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_off0000d9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E7 5248 bytes
SHA-256: 4aec219c1a66ba7240c0b9638956fb39d2d5f8b650caf37909058f5804e78412
font_01_sfnt_off0000ebce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCE 10392 bytes
SHA-256: dc99a69d12f3e6f0cc53d5cda9c0fe812510c6aa9756807dea43e851cc018890
font_02_sfnt_off00010f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.