Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a02a6804c57f65…

MALICIOUS

PDF

77.0 KB Created: 2021-04-04 04:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5a6878d6be4f3a958df0de3747c91d16 SHA-1: b2744eae28ffce78abf83457c536595d04004e4b SHA-256: 76a02a6804c57f65244e714961c5a85999514e875bdb795969ed9f4b3ac0eebf
186 Risk Score

Malware Insights

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

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 0.9990

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://druttle.ru/wix?keyword=download+take+care+by+rihanna+and+drake PDF link annotation
    • https://cdn.sqhk.co/zujumatatub/dPM3OdV/rigorejomurok.pdfIn PDF document text
    • http://sufaxaviko.22web.org/cysa_objectives.pdfIn PDF document text
    • https://magirakikepemun.weebly.com/uploads/1/3/4/0/134000039/402c6.pdfIn PDF document text
    • http://xteenware.online/condom_size_calculator_ukg2si9.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelojid/ghGiebi/33139118477.pdfIn PDF document text
    • https://katopogovalasa.weebly.com/uploads/1/3/5/4/135401177/9286347.pdfIn PDF document text
    • http://siteznakomstv69.space/218530697801xj0p.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxatotukaru/hhgqhha/rorebabefuwubedixubojefi.pdfIn PDF document text
    • https://cdn.sqhk.co/dokamaruxif/gigLhf2/mens_longer_hairstyles_images.pdfIn PDF document text
    • https://cdn.sqhk.co/mujipumelebe/cpclmhe/tatonadexarilepakilumipor.pdfIn PDF document text
    • https://somirurawepaf.weebly.com/uploads/1/3/1/3/131381963/1453488.pdfIn PDF document text
    • http://rebelliona.online/vclav_havel_audiencet9rbr.pdfIn PDF document text
    • http://tuvobanunezito.22web.org/gaxamidawitoba.pdfIn PDF document text
    • http://xonesasa.iblogger.org/comparing_unit_fractions_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/YsMzgPL/falling_in_reverse_songs_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/ifoibbs/anniversary_cake_images_wallpaper.pdfIn PDF document text
    • http://draiwenstore.online/wugejowitununowezawuzet7w7xq.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/jeifyGd/95344780737.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/jligjjf/kawinaxajogunivomowe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuresiru.epizy.com/att_international_calling_guide.pdfIn PDF document text
    • http://tinulelor.rf.gd/60880627947.pdfIn PDF document text
    • http://fitudaled.rf.gd/twilight_breaking_dawn_part_1_watch_online_full_movie_in_hindi.pdfIn PDF document text
    • http://vewojaxelufobif.epizy.com/kitchenaid_artisan_5_qt_reviews.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
    • 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_off0000cd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD67 5248 bytes
SHA-256: cbfd9e61dc018b9ca3a8412074383f7d49c759b0122ddbe9a0f261fd2e2615d9
font_01_sfnt_off0000df59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF59 11540 bytes
SHA-256: 197a150823b3e2cbc697d007a10282dbee52d2b98815e16f5f93e6eecd3d90f8
font_02_sfnt_off00010609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10609 18776 bytes
SHA-256: 1df41416ece054d3cca32f135e48dc95f4d9c8a2bff4ba4edba1d14e21aabef6