Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3fca4dbddcc67a…

MALICIOUS

PDF

74.9 KB Created: 2021-02-16 11:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 13aead67078c327c96ad36520d9109e7 SHA-1: d37ca90762d27bb482e0d33eddc7071397758b96 SHA-256: bf3fca4dbddcc67aa0918a005869b6532c24ce3aa9649607c7b83e888379abcf
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or redirectors, indicating a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/aws?utm_term=the+trials+of+apollo+book+four+the+tyrant%2527s+tomb+free+pdf PDF link annotation
    • https://cdn.sqhk.co/sivadapexiri/gNii0Ar/unlimited_tok_views.pdfIn PDF document text
    • https://cdn.sqhk.co/modurasisuwu/ifuheXp/andor_s_trail_quest_surprise.pdfIn PDF document text
    • http://onlyforyou.space/giwegez8zh1x.pdfIn PDF document text
    • http://natlab.ru/example_of_topic_sentence_and_supporting_detailshonmr.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/gjgggia/top_scorers_nba_2020.pdfIn PDF document text
    • http://befakupamexi.iblogger.org/sabelaxokolamobebamene.pdfIn PDF document text
    • http://lightly.store/bengali_album_songs_2017wpxuy.pdfIn PDF document text
    • https://cdn.sqhk.co/rutesawir/Cgfhiif/seselofakewenoguxejade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451544/normal_6023f3acdcca9.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/DigQmde/jodusepasawasoxuvegir.pdfIn PDF document text
    • http://titoto.xyz/kindle_app_for_android_free_apkr32sh.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/sojaxub/zamunebagino.pdfIn PDF document text
    • http://povinadoli.epizy.com/cv_sample_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/jopazu.pdfIn PDF document text
    • http://jopanitovoxa.epizy.com/bevosibuzejij.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/the_angriest_man_in_brooklyn_parents_guide.pdfIn PDF document text
    • http://ruzizoxotawuva.epizy.com/reformas_borbonicas_en_america_consecuencias_sociales.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_off0000e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE604 5568 bytes
SHA-256: 32eb03cc5a5460fde786ec8affa4b624faa2f2700437b8d3252574bbbf10f53e
font_01_sfnt_off0000f8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CF 10748 bytes
SHA-256: 4f5aabae9d817ab246e1da3cb75c4beb41b9433b8ce1e0dff1ff5f9105e7ad78

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