Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96961f0019829d7…

MALICIOUS

PDF

71.2 KB Created: 2021-03-04 01:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 42b21ece3254918142476b6e43b2c6ad SHA-1: 3ac7dd87c68d71ce4bcc47b2a62e3d555b965188 SHA-256: c96961f0019829d7528acf500019794e2a0499a92cf1030225d64bb2dc979350
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious phishing content. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in tech-support scams or phishing operations. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit vulnerabilities or trick users into executing malicious content, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=assurance+wireless+activation+code PDF link annotation
    • https://gexuguxibam.weebly.com/uploads/1/3/2/6/132696321/xanawotogaxepa.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/12_steps_program_book.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/kenigevedosasu.pdfIn PDF document text
    • http://pobesegu.scienceontheweb.net/givovozukaronawunegaruxu.pdfIn PDF document text
    • http://liruroz.iblogger.org/lagepawemus.pdfIn PDF document text
    • http://mebowakop.22web.org/sevidex.pdfIn PDF document text
    • https://subarijarasojud.weebly.com/uploads/1/3/4/3/134332778/xuvaximoxuwu_vuwozulil_vuxalufunerufe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lufeneweb.epizy.com/android_studio_bundle_141.pdfIn PDF document text
    • http://tavamikilav.myartsonline.com/sony_rx10_iv_manual_focus.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/mini_crib_sheets_organic.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/sentence_formation_of_muttered.pdfIn PDF document text
    • http://vifidumefitur.atwebpages.com/88138997019.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/kontrol_s4_mk3_price.pdfIn PDF document text
    • http://wixezujixib.epizy.com/87905318926.pdfIn PDF document text
    • http://girofili.myartsonline.com/80767920323.pdfIn PDF document text
    • http://kusuganuxe.epizy.com/vabanuzadijurolebuzetiri.pdfIn PDF document text
    • http://kadoxosin.atwebpages.com/az_driving_test_questions.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_off0000d946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD946 5076 bytes
SHA-256: c88fb5d5c61ca9caf2785713b3a4b9032de9270a8e2f709569f4e56e8b5f9a9c
font_01_sfnt_off0000eaa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA9 10900 bytes
SHA-256: d234a0a3d0678510d26554545d0ac38bf65ef6846386534811f097010bf3da69

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