Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24885b9c67afa07…

MALICIOUS

PDF

73.5 KB Created: 2021-02-21 04:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 42662f063ba7b615a2c2b324dc643cfb SHA-1: b3c92b817b477a1d3c79c6924f925f1a29f295b6 SHA-256: a24885b9c67afa0716b8f28b13e63543b56e520db62f8aad676365d6d7993e6f
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://druttle.ru/123?utm_term=how+to+use+xfinity+cloud+dvr+lite PDF link annotation
    • https://cdn.sqhk.co/xopuxuvop/Aidysmw/wuwoloxasezaki.pdfIn PDF document text
    • http://roflan.site/not_about_angels_violin_sheet_musiccck6z.pdfIn PDF document text
    • https://sudomudes.weebly.com/uploads/1/3/0/8/130874284/tuxekawibiki.pdfIn PDF document text
    • http://pe50off.pro/talking_tom_game_in_jio_phone0vvlc.pdfIn PDF document text
    • http://itprod.space/job_guidelines_meaning_in_tamilyvl0n.pdfIn PDF document text
    • http://naturaitalia.space/tajipoxokikagodakizev62u65.pdfIn PDF document text
    • http://sipivide.iblogger.org/camping_knots_guide.pdfIn PDF document text
    • http://hristogrigorov.com/ejercicios_cintura_escapulara339i.pdfIn PDF document text
    • http://sreda.city/state_stokes_theoremzeryx.pdfIn PDF document text
    • http://soul-felt.com/30446125738uqsg6.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/3vRgfhi/fear_the_walking_dead_season_6_cast.pdfIn PDF document text
    • http://douchehq.xyz/341825413621xlxp.pdfIn PDF document text
    • http://sodahub.club/137118941331v4mz.pdfIn PDF document text
    • http://pihodze.com/97281752089gkiy4.pdfIn PDF document text
    • http://sunshop.pro/28702766403k4pn8.pdfIn PDF document text
    • http://voicebftyi.com/pizza_boy_gbc_pro_apkbmvov.pdfIn PDF document text
    • http://vorgazme.com/26904581058su7yw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vateden.epizy.com/90982192389.pdfIn PDF document text
    • http://puxetedategekex.epizy.com/small_intestine_anatomy.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_off0000e418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE418 5088 bytes
SHA-256: a38025ac268fd5ebf5b0d0b10c0da86c86d469fc12bb8e25e10b47c510be8d7b
font_01_sfnt_off0000f597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF597 10252 bytes
SHA-256: c6fae0349e21b1ed687f9a280fa196963570e71c44c63516304acf345111a1d4