Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0b7654ae9fe6e5…

MALICIOUS

PDF

80.9 KB Created: 2021-05-24 07:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fea215a29388094d00acaaf6c634883a SHA-1: d37f132cf4b907fce99cde39e3ab1d3c3b02c57a SHA-256: 7a0b7654ae9fe6e5a06162b391d00e5b1ae74dd62d2a658cbeabbdf72891ec05
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The heuristic PDF_SEO_LINK_FARM indicates a mass of external PDF links, and the ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely intended to redirect users to malicious content, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=filmywap+punjabi+movies+2019+download+watch+online
    • https://mufaguzesevulet.weebly.com/uploads/1/3/2/8/132814956/dekimasonexoxes.pdf
    • https://reguzuseja.weebly.com/uploads/1/3/2/6/132695615/nemijefizoveni-ranapurerud.pdf
    • https://jubagidegugidok.weebly.com/uploads/1/3/5/3/135317658/3445790.pdf
    • https://napudipeludade.weebly.com/uploads/1/3/4/3/134344161/ccbe6401afb3d2.pdf
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/futaganasugadot.pdf
    • https://static.s123-cdn-static.com/uploads/4418566/normal_6004ae98d0078.pdf
    • https://cdn-cms.f-static.net/uploads/4470975/normal_60468bb75b14a.pdf
    • https://xununurolaweb.weebly.com/uploads/1/3/4/6/134673503/7063648.pdf
    • https://damajarulapo.weebly.com/uploads/1/3/0/7/130738748/3152777.pdf
    • https://rikizanasurixa.weebly.com/uploads/1/3/1/3/131379420/4c8b6d2.pdf
    • https://static.s123-cdn-static.com/uploads/4473044/normal_5fc7618f3bb0f.pdf
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fcdfd4f196c7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wutogugej/xojowuvawube.pdf
    • https://s3.amazonaws.com/jazuravazaguz/is_echo_dot_3rd_gen_better_than_2nd_gen.pdf
    • https://s3.amazonaws.com/jivamubug/how_to_install_android_x86_on_virtualbox.pdf
    • https://s3.amazonaws.com/kizugokofo/93654201339.pdf
    • https://s3.amazonaws.com/wujodibu/xaxokosopi.pdf
    • https://s3.amazonaws.com/wemazun/97372804958.pdf
    • https://s3.amazonaws.com/tozaduliwubega/what_is_the_healthiest_frozen_breakfast_sandwich.pdf
    • https://s3.amazonaws.com/sajatesawodiji/76326475549.pdf
    • https://s3.amazonaws.com/luborinizu/compare_and_contrast_the_lightning_thief_book_and_movie_worksheet.pdf
    • https://s3.amazonaws.com/mubefula/59654972892.pdf
    • https://s3.amazonaws.com/jolunenafobuw/ditiwo.pdf
    • https://s3.amazonaws.com/rebesudanolo/aspiracion_de_secreciones_traqueostomia.pdf
    • https://s3.amazonaws.com/mogedozara/azar_gems_hack_apk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb9e.bin
525122c64ffd785291dd363ce86ebcf1bfad74bc2810658635c3c7115ea58611
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9E 6124 bytes
font_01_sfnt_off0001106c.bin
33ef3ca88c1d28b24a780b5fb5bebbfbf9690d6b4d2c1a9e2dd81dd612abee81
pdf-font-stream PDF embedded font (sfnt) at offset 0x1106C 10824 bytes