Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3aad5bd0e55b303…

MALICIOUS

PDF

125.0 KB Created: 2021-02-14 21:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cc4a413e5933eceb136f7a7f16a27504 SHA-1: c5df1bbef6fb43d75944d5133d04583f9f53d507 SHA-256: e3aad5bd0e55b30385dab1ecbd2b890bb5fab64e9cd905868fe54fe8de973c7a
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 0.9998

Heuristics 6

  • 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.
  • 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://bologen.ru/123?utm_term=elk+lake+school+springville+pa PDF link annotation
    • http://repetitor-ru.ru/pdf_to_word_ocr_software_free5vevc.pdfIn PDF document text
    • http://andyhongdigital.com/libro_de_cardiologia_guadalajara_descargar_gratis7ma84.pdfIn PDF document text
    • http://itawegan.space/sakafutupesga65n.pdfIn PDF document text
    • http://fusubakitakudup.66ghz.com/dragon_ball_z_dokkan_battle_jp_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/Cggij4C/pakawebapumejoduzizimevij.pdfIn PDF document text
    • http://prizinsta.info/xexezavo8tgj.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/JgiGmge/cars_for_sale_under_5000_los_angeles.pdfIn PDF document text
    • http://kraftmann.su/83819132138hrm4q.pdfIn PDF document text
    • http://sibuvre.com/52243480546l6fi8.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/T3qhcid/3d_metal_model_bass_guitar.pdfIn PDF document text
    • http://unlockdeals.shop/el_modelo_atomico_de_sommerfeldo03p8.pdfIn PDF document text
    • https://cdn.sqhk.co/tijatabov/d99pQje/super_word_search_puzzles_santa_claus_answers.pdfIn PDF document text
    • http://morpeoplelife.ru/candy_camera_old_version_for_androidz7cdt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fugewad.rf.gd/mireregipexox.pdfIn PDF document text
    • http://rujolur.rf.gd/guitar_neck_jig_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/ronavibekakibafipobuk.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/67411891229.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/62272554824.pdfIn PDF document text
    • http://kikuzekoxo.rf.gd/52225166657.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/two_stroke_diesel_engine_file.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_off0001abc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABC7 5276 bytes
SHA-256: 328db36c3e37ec4f28c5da20023cab82a467effa79b5c4dd0bce1d30dc1b4854
font_01_sfnt_off0001bdc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDC4 11992 bytes
SHA-256: 5bfa6e84772662799c559a3b3475d6bff643360125619c1b697d7a59f275789b

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