Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a0fbc6c8eed024…

MALICIOUS

PDF

87.8 KB Created: 2021-02-06 21:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fba4c0d8b6bcbe2f162bc6ba80eb5e18 SHA-1: 72ec326b4b0884c7ea3f4d5deb1bd68715b1e866 SHA-256: c0a0fbc6c8eed024d7181704d7efe523b06116a114b7332b72f52d0499107cd5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains and link farms, suggesting it's used for phishing or distributing further malware. The document body, though heavily obfuscated, contains metadata related to a refrigerator manual, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://druttle.ru/aws?utm_term=whirlpool+refrigerator+manual+wrs342fiam PDF link annotation
    • https://cdn.sqhk.co/bowevuva/hTegdbj/1483170781.pdfIn PDF document text
    • http://naturalgood.space/8x8x8_led_cube_arduino_codei9kjo.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/idjaxUi/4038322688.pdfIn PDF document text
    • https://tebifuwufarul.weebly.com/uploads/1/3/4/8/134886387/mapexow.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/dgh8Hif/mother_earth_news_fair_2020_schedule.pdfIn PDF document text
    • https://kasasifu.weebly.com/uploads/1/3/4/6/134697732/1821351.pdfIn PDF document text
    • https://kaxitojuwomig.weebly.com/uploads/1/3/5/3/135302818/rijibeful.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/biomedical_science_graduate_cv_template9s1ze.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/Fid8Xif/pokemon_cards_for_sale_near_me.pdfIn PDF document text
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/1006950.pdfIn PDF document text
    • http://love-your-lips.online/bbc_literature_companion_class_9_english67ovx.pdfIn PDF document text
    • http://naturaitalia.space/174150430781smxu.pdfIn PDF document text
    • http://pedalini.club/la_suma_de_los_diasuf02u.pdfIn PDF document text
    • https://kazenoti.weebly.com/uploads/1/3/2/7/132740362/298992768.pdfIn PDF document text
    • https://boforotove.weebly.com/uploads/1/3/5/3/135393238/mejumedomiber_wabipavoperivej_gapanixujun.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/zDHfgiT/myrkur_house_carpenter_lyrics_meaning.pdfIn PDF document text
    • http://xtreme-sport.ru/bblia_explicada_versculo_por_versi0d89.pdfIn PDF document text
    • https://cdn.sqhk.co/dazenolaxuj/g97gdrH/tropico_5_supervillain_walkthrough.pdfIn PDF document text
    • https://laxoweveludek.weebly.com/uploads/1/3/0/9/130970009/tipadilarusokaralexo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10195 5804 bytes
SHA-256: 732599d76d7f928c88f15443d40ed793ec870ecc76848007ef3024877f816d1c
font_01_sfnt_off00011552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11552 11424 bytes
SHA-256: 45b19f6a5bf4e0ea8047556b86fc6733d79da8bf3d6336b829a5fa7d5e4e3566
font_02_sfnt_off00013c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C5F 16232 bytes
SHA-256: c2f1b8e27e4c5d1eb6694bcf999bed56489d599ed66a9b176e3ad865fa2ee921