Malicious PDF — malware analysis report

Static analysis result for SHA-256 72401200972aef3d…

MALICIOUS

PDF

73.7 KB Created: 2021-04-06 12:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d8399c52d86ec8b91aa38b6ac6e88592 SHA-1: 2cef8a7944779c94bd383a9e5aa5d685fe127048 SHA-256: 72401200972aef3ddaa105b3755a8a3fb32b7c0d3d644a9edc98982cf6ced16a
146 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. It uses a callback-phone (TOAD) lure. 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 0.9960

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://resalured.ru/strik?utm_term=bently+nevada+3300+xl+nsv+proximitor+sensor PDF link annotation
    • http://vipifud.22web.org/casting_defects.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483345/normal_5fff38823c8bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455208/normal_6015e36f5a73a.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/jajfJhh/53949358778.pdfIn PDF document text
    • https://cdn.sqhk.co/kanereneb/heXjbf6/7039287994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447465/normal_606627af6580f.pdfIn PDF document text
    • http://kozupuj.iblogger.org/49745320415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492555/normal_60105d9454914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391302/normal_60500148ae4ee.pdfIn PDF document text
    • https://rizogogitire.weebly.com/uploads/1/3/5/3/135323834/c63c28.pdfIn PDF document text
    • https://lewubudakaxawo.weebly.com/uploads/1/3/4/3/134342842/7900753.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/mevifurozuxuzu_bezix_buzixalazes.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/9gegfGJ/machine_gun_kelly_girlfriend.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/DINjahd/75026586459.pdfIn PDF document text
    • https://cdn.sqhk.co/bajowekununa/rYgegja/video_of_tuberculosis_patient.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_6022c0fbaa18b.pdfIn PDF document text
    • https://nigenodesi.weebly.com/uploads/1/3/4/4/134480521/sugodabifot_posagekosunope_febibemuzejup_ronuko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464724/normal_6048e8ff35f2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419001/normal_5fde9efad2f03.pdfIn PDF document text
    • https://soxapibojewaw.weebly.com/uploads/1/3/5/3/135345372/ritolelodur_fisuzagev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/bhojpuri_song_hd_video_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/27943101431.pdfIn PDF document text
    • http://guluvuto.rf.gd/ganarokabirumegoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/probationary_period_review_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/background_hd_frame_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/6408329825.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_off0000de21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE21 5692 bytes
SHA-256: fcb37a31650c0ecd71371e89dbf0b64b4180bf64bb14bf25290cb5e5f377a25f
font_01_sfnt_off0000f179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 11020 bytes
SHA-256: 8df608d88347ca061b852d0bed06266694696f3d6b48741fdd266cecc9ee7967