Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca7c29adcf4b1e2c…

MALICIOUS

PDF

102.5 KB Created: 2021-04-04 10:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 575347d6ff34c7c3673bc1432ca65724 SHA-1: 1846be418c66aa2d1ec8bfccbf89cbf0dba8fb90 SHA-256: ca7c29adcf4b1e2cc159c8b66e360c8dbb9228654f2f27ea577dd2b5e6f09d23
154 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. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=what+are+some+gta+5+cheats+ps4 PDF link annotation
    • https://cdn.sqhk.co/xelalizogim/jbzjdbc/fozinavelagonupotalosupor.pdfIn PDF document text
    • http://nafaguxidu.iblogger.org/form_wizard_bootstrap_4_template.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/evih8hj/96913799607.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/gqedQio/rankedin_spt_trelleborg.pdfIn PDF document text
    • https://cdn.sqhk.co/kenujowemi/jjgKrij/66951846427.pdfIn PDF document text
    • https://cdn.sqhk.co/tagisaxozof/gINjfWc/10031654918.pdfIn PDF document text
    • http://kifevoliga.iblogger.org/orbit_water_timer_not_working.pdfIn PDF document text
    • http://ninefukesat.iblogger.org/jazel.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/JgiOjhp/short_film_scripts_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/jCiebgf/zujexo.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/biaLgru/dead_ahead_grateful_dead_cover_band.pdfIn PDF document text
    • https://cdn.sqhk.co/konajera/0hejhi4/nesusole.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jujeludapivibiw.rf.gd/nifadibizojuxixuxanato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d313a25-1310-4869-9b32-5e142d71ea5d/2331319447.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/which_groups_made_up_the_third_estate.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/worodukagutik.pdfIn PDF document text
    • http://bopebogixa.rf.gd/65576349575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2508e431-9ca4-47a0-bd5b-82ef18986140/80949480775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b2c88aa-999e-4b0c-af1c-fcc6fe72653b/tokakomej.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/lokoxirumamogebefi.pdfIn PDF document text
    • http://tivagikirela.epizy.com/35225711037.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/microsoft_original_spider_solitaire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8254f9c-db9d-42fc-b614-197ef4cb7fcf/what_is_the_timeline_order_of_the_star_wars_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/44558723345.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_off0001545d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1545D 5540 bytes
SHA-256: e221b34d8708a32bbdaa5167a185924d28d105786469ff42aab698c4d8998325
font_01_sfnt_off00016723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16723 11128 bytes
SHA-256: 1718e2d2b3c0900151f62729037b2cea396a4738685f2eb08be5a30738150b96