Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb14f1f55f1dd5f…

MALICIOUS

PDF

88.6 KB Created: 2021-04-08 03:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9e498bc9db96722a42a10aba11484474 SHA-1: ba00e866dc16dae8994a3c9e2bdd7de9fcdbe758 SHA-256: ccb14f1f55f1dd5f85e7374948ac8730cc62c8425731bf10f022c74fd67188b3
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm and a callback phishing lure, prompting users to call a number in a deceptive context. While no scripts were extracted, the embedded URLs suggest a phishing attempt, likely leading to further malicious content or credential harvesting.

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) or Microsoft license-boilerplate 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://jottigo.ru/strik?utm_term=alaska+driver+licence+written+test+near+me PDF link annotation
    • http://najetaxu.mygamesonline.org/6349664274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_604cdcb107ae8.pdfIn PDF document text
    • https://kemiponoza.weebly.com/uploads/1/3/4/6/134605011/d4a28.pdfIn PDF document text
    • http://mazejofeg.mygamesonline.org/leadership_styles_theories_and_models.pdfIn PDF document text
    • http://jigapenufi.medianewsonline.com/xamakafuzadutirikome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383800/normal_602f2c24dab4c.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/30509726966.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/83604982401.pdfIn PDF document text
    • https://xaxarudo.weebly.com/uploads/1/3/0/7/130740130/3e0d7.pdfIn PDF document text
    • http://resipowepo.getenjoyment.net/sales_director_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475861/normal_602c046623c3f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f4fb0d-ffc5-4109-908c-6a19112c82eb/microsoft_server_2012_r2_standard_iso_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/61464558559.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/how_to_clean_a_380_bersa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/410e8692-433a-48d4-a63a-99e2e11c3d46/delta_22-580_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c362e655-2bf6-4a13-90a4-0057c5dc6d28/how_to_troubleshoot_pc_no_power.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/andromeda_substratum_rootless_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3770437d-bedd-41d9-ad33-f6d64ebbea7d/pukufojujobulenuwif.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B89 5292 bytes
SHA-256: 66133aa4c676dd39d53ca3209d974c694f43a8b9aec777e518bd64de192682f2
font_01_sfnt_off00012d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D84 11804 bytes
SHA-256: dd57e87832e486d185f455056f23de7c85a2c77b4dbeb996dcbccc84c337f999

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