Malicious PDF — malware analysis report

Static analysis result for SHA-256 916bb62f7dd79870…

MALICIOUS

PDF

70.9 KB Created: 2021-03-22 05:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fcd1a5b28af375131ed1b558ceb4b379 SHA-1: da60a77c6463916c1c4a932a717c20d4a9d1c681 SHA-256: 916bb62f7dd79870aecaf99205f1d5d92668dbfd457bc2958504f9724f858e5d
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 0.9997

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://fokemale.ru/wix?keyword=consumer+behavior+babin+harris+6th+edition+pdf PDF link annotation
    • http://talakam.space/16008352947h9e3c.pdfIn PDF document text
    • http://item-mask.top/95276047666vgkxr.pdfIn PDF document text
    • http://afracheat9.xyz/87640291948pfydz.pdfIn PDF document text
    • http://afracheat9.xyz/84024198543g7r1a.pdfIn PDF document text
    • http://gbo.guru/tom_clancy_books_in_order_listpilxd.pdfIn PDF document text
    • http://pollsexpert.com/vexuwojemewasideur14m.pdfIn PDF document text
    • http://ayazshabutdinov.club/57436357836ahjh5.pdfIn PDF document text
    • http://nonly.xyz/masubavinufisefegesixiq680f.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/wood_glue_msds.pdfIn PDF document text
    • http://xokebidukefu.getenjoyment.net/misevisudewelo.pdfIn PDF document text
    • http://doweryklkq.space/mera_bhola_hai_bhandari_djpunjab_songj0hxs.pdfIn PDF document text
    • http://karaulovlife.site/69840957590fpuj5.pdfIn PDF document text
    • http://wawimetuboze.iblogger.org/cascading_style_sheets_codes.pdfIn PDF document text
    • http://itdiscount.info/background_music_free_onlinehq8xc.pdfIn PDF document text
    • http://goldstein.berlin/xafilulolimunetetodogafor183f.pdfIn PDF document text
    • http://startbastar.online/free_bow_tie_sewing_patternt0k5a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://divejekojo.epizy.com/19129442327.pdfIn PDF document text
    • http://rawegutidum.onlinewebshop.net/calendario_escolar_cyl_2020.pdfIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/dieta_atkins_italiano.pdfIn PDF document text
    • http://gototura.myartsonline.com/478035842.pdfIn PDF document text
    • http://dipibezepipes.rf.gd/halloween_coloring_worksheets.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_off0000d70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70A 5508 bytes
SHA-256: caef8767e5ceb4e50d6b2f19b2f3eb66f15fafe34567f41989769cfa1c038ace
font_01_sfnt_off0000e98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98F 10772 bytes
SHA-256: 43d4dec23ef9a23670c79a990efe6635253fa9a5ff845f41cde7fd04e28eb5c4