Malicious PDF — malware analysis report

Static analysis result for SHA-256 3547dddd44aa0f65…

MALICIOUS

PDF

82.3 KB Created: 2021-03-14 18:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ff4d7b46f0d999d9708ff32dbb3432e0 SHA-1: a8726e62baa95bf902e4a34298f3eeac29576bfa SHA-256: 3547dddd44aa0f65e7350f0deb5e06c39921bf9b5a849c3c12abc01151cb811f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary malicious URL identified as dugedepap.ru. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on disposable domains, suggesting a phishing or spamming operation. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://dugedepap.ru/award?keyword=asymptotes+of+logarithmic+functions+pdf PDF link annotation
    • http://najetaxu.mygamesonline.org/vegan_keto_70_healthy_delicious_low_carb_recipes.pdfIn PDF document text
    • http://jabewes.medianewsonline.com/oxford_discover_grammar_1.pdfIn PDF document text
    • http://wodaserurefuw.iblogger.org/siwifisiwirav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kasarokoxakuke.epizy.com/globo_reporter_portugal_algarve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea924007-a94b-4a14-a4a3-f654fdcf19ff/what_type_of_plate_boundary_does_seafloor_spreading_occur_along.pdfIn PDF document text
    • https://9f2a6cc1-6e15-4467-beaa-57274ca996ed.filesusr.com/ugd/78f4c3_f0497ab5f5024b7f86d0d0d7a05ba406.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/76595417703.pdfIn PDF document text
    • https://05b56818-8b0b-4484-a411-4f1234233f1c.filesusr.com/ugd/e49726_d06aba0ac368408b8ebea4cc98fc02cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/79168845728.pdfIn PDF document text
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_275a971553e747d6a0fedc23a48c0c6b.pdf?index=trueIn PDF document text
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_b2ec20e8098545c39c8fb71813e061d7.pdf?index=trueIn PDF document text
    • http://bifakafuwal.rf.gd/30443949804.pdfIn PDF document text
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_018e577ad63d4a78809f2ab59c34878b.pdf?index=trueIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_97f5c481bc57497cbf0e744b0f44140c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/bottlehead_crack_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c644b5-5d05-4ede-aafd-65f7b028265c/sepexiwajowerepis.pdfIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_65cce2cdb6304880aa2199b15dcb7d5b.pdf?index=trueIn PDF document text
    • http://katilujovuge.rf.gd/zusonekodaroxifun.pdfIn PDF document text
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_4f870e498961400887b18429b0adf50a.pdf?index=trueIn 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_off00010450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10450 5660 bytes
SHA-256: 11ba52740a66b4b8308297e5efe7935b2e971be13eb7840efa583c5dd57f1e7a
font_01_sfnt_off00011770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11770 10720 bytes
SHA-256: 682d9a3f906e79ef4f16906953ca1c4621412256385428a2f77378ae2e03c973

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