Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d2a4064ff02b59…

MALICIOUS

PDF

75.4 KB Created: 2021-03-14 23:29:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7638aa5725d38353e1d19548818ac398 SHA-1: a14f48e5962120c1c391258d34f8c9a7dddb3758 SHA-256: b9d2a4064ff02b59ca4c4bca99fea75b05b1208c70d4d57776c7b3d8541a1bb7
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users. The primary lure appears to be downloading an Android TV application, as indicated by the URL keywords and the document body's metadata.

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://ponafet.ru/wix?keyword=download+hulu+apk+for+android+tv PDF link annotation
    • http://help-feedback-amzn6.xyz/brother_movie_video_songs_hdwx9h5.pdfIn PDF document text
    • https://poxovarakegi.weebly.com/uploads/1/3/5/3/135326731/6859797.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/jijuxugupulu.pdfIn PDF document text
    • http://purpless.vip/braava_380t_beeps_3_timesq5rnt.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/ruguzajimugemolesezusakawlvprm.pdfIn PDF document text
    • https://kevavabine.weebly.com/uploads/1/3/1/4/131406582/wuwiz_soxilobemodagap_motiti_rejovarif.pdfIn PDF document text
    • https://kiparefewegapip.weebly.com/uploads/1/3/2/6/132682538/9754500.pdfIn PDF document text
    • http://domen3.club/instructions_on_how_to_play_balderdashzd0i0.pdfIn PDF document text
    • http://xuribof.medianewsonline.com/cambridge_english_for_engineering_solutions.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/big_green_egg_size_large_cover.pdfIn PDF document text
    • http://metryck.info/97577424178q12w9.pdfIn PDF document text
    • http://lavka-karamel.ru/777626172439jf68.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/linud-fumidajekenedef-rirokod-kitopuj.pdfIn PDF document text
    • http://dress-russia.ru/sefogmdp9c.pdfIn PDF document text
    • http://appless.space/pugodxt37v.pdfIn PDF document text
    • http://vir-tus.com/sokivezefotefuv7rvbq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/ferapezobejil.pdfIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/how_to_change_casio_hr_100tm_calculator_ink_cartridge.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/xopujifobufaf.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_off0000e899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE899 5168 bytes
SHA-256: 873e659c42791e04eb88a75456498add66413b05b969f30748db4a28b67f54a6
font_01_sfnt_off0000fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 10764 bytes
SHA-256: 90d83ccb63233a3f50643902c15a77b61dd61e13741afcb9940161814af528e4

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