Malicious PDF — malware analysis report

Static analysis result for SHA-256 8482c80bfa30ccb9…

MALICIOUS

PDF

95.7 KB Created: 2021-03-25 01:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8abccc51d80a8110b124af71661a47e8 SHA-1: 346cd5a6d3d82a8c7834355a91f8b746ba67365c SHA-256: 8482c80bfa30ccb94cce4c7fd4329b8f4bf6ec6ee09b0b92de3662b37136f65e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically related to phishing and link farming. The PDF contains a large number of external links, many hosted on disposable domains, suggesting an attempt to direct users to potentially malicious or deceptive websites. The ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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/award?keyword=operational+amplifier+with+linear+integrated+circuits+stanley+pdf PDF link annotation
    • https://cdn.sqhk.co/medukukekuke/gd9ZjS7/kazebofole.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/g0hcbib/colorme_coloring_function.pdfIn PDF document text
    • http://car-den.ru/biomaterials_for_tissue_engineering_applicationslxn8b.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/54981855082uink5.pdfIn PDF document text
    • http://santand-es.com/what_are_the_three_parts_of_the_cytoskeletonjb02t.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/3BIRhbB/vujowumoju.pdfIn PDF document text
    • https://cdn.sqhk.co/jaruxabal/jSjadhb/6895500587.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/454748255391loes.pdfIn PDF document text
    • https://cdn.sqhk.co/rodisukipi/fjh9jia/ludo_star_gems_hack_2020_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/gjglHQS/the_angry_birds_movie_2_uk_review.pdfIn PDF document text
    • http://usechambre.xyz/877373323769zgxj.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/hfThdbX/50276559524.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/ja8jdjj/roostermoney_piggy_bank_allowance_and_chore_application.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CsaOhdD/77800013952.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/vighjW7/2993932304.pdfIn PDF document text
    • http://egosikenclub.com/gigabyte_ga-x58a-ud3r_rev_1.0_manualpfa9m.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/Uj4hbjj/barbershop_cast_billy.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/f2Qijij/minimalist_outline_art.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_3e9dc66c29644d359e9b4ab4f11cd026.pdf?index=trueIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_5af00feaa8f8458d8eca84ac9aee2aac.pdf?index=trueIn 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_off00011f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9D 5788 bytes
SHA-256: 0bd3571b1864a5892d70cd800247e3995b1e6831bd226b29a8ecf840e8eb8d90
font_01_sfnt_off0001333b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333B 11784 bytes
SHA-256: 569ea6cc62f1f74e30565bced2b9c28b791459445bcc4b5adeb80606f24702c3
font_02_sfnt_off00015b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B9E 16060 bytes
SHA-256: 503f5200e83b189a546b6c6e1d808633a9135186956fe76ff9bd78de3d91e3c6