Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f0f1ea4df137da…

MALICIOUS

PDF

106.8 KB Created: 2021-03-08 08:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ca637a22b38367611c58187f307db480 SHA-1: bfbb0745ac87010aca1edcd93fc496b0b78c0737 SHA-256: 74f0f1ea4df137da1a41d74c8bfe47f4b710c8490d5fb9763f6e486a0248634e
146 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are presented as search results for technical documents. This pattern is indicative of a phishing or malware distribution lure, aiming to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/wix?keyword=heat+exchanger+design+handbook+kuppan+thulukkanam+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/kibedutej/djbdQ9O/30680113226.pdfIn PDF document text
    • http://vosajizegek.mypressonline.com/lavesuluvokiti.pdfIn PDF document text
    • https://jawoxaze.weebly.com/uploads/1/3/0/9/130968973/lezabevuti_wenekel_zenakijijox_tazoju.pdfIn PDF document text
    • https://jafiwivejo.weebly.com/uploads/1/3/5/3/135305612/8efdfcec.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/hievWia/rope_bottle_holder_apk.pdfIn PDF document text
    • http://richteam.site/seventh_day_adventist_hymnal_ppter8dr.pdfIn PDF document text
    • https://cdn.sqhk.co/gunuzuli/HlOjiC3/26848566562.pdfIn PDF document text
    • http://am-sound.ru/why_is_my_traxxas_remote_blinking_green9c6e7.pdfIn PDF document text
    • https://jebasunegafepes.weebly.com/uploads/1/3/1/6/131637224/guxemem.pdfIn PDF document text
    • https://sebimifovuduga.weebly.com/uploads/1/3/5/2/135298708/wepapu_buxoboxade.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/jehagh4/pet_shop_jojo.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/bj9hBSA/islands_for_sale.pdfIn PDF document text
    • https://fuvodaxe.weebly.com/uploads/1/3/1/3/131379021/0e2671efd3ab246.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruruwuvatokatal.onlinewebshop.net/98882670692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140f3191-efb7-4300-aa6a-e3187ca73c18/52586683895.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/63610376564.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/map_skills_worksheets_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3962451-98a6-430d-af4a-b8f6ec60b283/french_english_dictionary_book_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7951068-c4c1-462e-a2c2-bef49ad17288/hp_officejet_pro_8600_scan_windows_10.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/who_has_been_named_peoples_sexiest_man_alive.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_off00016164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16164 5892 bytes
SHA-256: 422a125e43d2f21de1cfcb136dace5ec93aafab79a1a834f1f1bb5d1a57c00ce
font_01_sfnt_off00017555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17555 11956 bytes
SHA-256: 0eecb47393e61eeb8677e02f622eff236f14fd4d798912f7624d863115500cf0

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