Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ded3a2f662c619…

MALICIOUS

PDF

75.5 KB Created: 2021-04-01 07:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 70266154ee8263e0fd37d1807beaf7be SHA-1: 35e5653b4dc1dfaf839a93fabf52e45caf4d2994 SHA-256: 14ded3a2f662c6192101fc014da5671c2164e628a0ee42d552a52d7790943003
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, indicating a likely attempt to redirect users to malicious sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/123?utm_term=reforma+big+ben+ate+quando PDF link annotation
    • http://naxuvazexipok.sportsontheweb.net/british_council_english_test.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/KJidiCG/popular_black_male_haircuts.pdfIn PDF document text
    • http://magic-spring.com/zetenopilaxanewilse5.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/hbibhgc/87528995614.pdfIn PDF document text
    • http://vitetoka.scienceontheweb.net/61234771786.pdfIn PDF document text
    • http://wugupomovupa.sportsontheweb.net/bronconeumonia_pediatria.pdfIn PDF document text
    • http://itchia.space/mirtazapine_for_dogs_anxietyl3h1e.pdfIn PDF document text
    • https://cdn.sqhk.co/toxotunem/gcagjWx/dokajewo.pdfIn PDF document text
    • http://xesepoxobij.22web.org/vupipoxolipiwom.pdfIn PDF document text
    • https://cdn.sqhk.co/bubuzibiv/iaWbfgd/fepabuvanufililumat.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/3dd484dd-964c-4a19-bede-9fdb3281d2a6/how_to_sew_designer_dress_shirt.pdfIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_0a652da2dfa74f4eae3160c7a2f1d061.pdf?index=trueIn PDF document text
    • http://kemibibej.rf.gd/90588775375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d387f6c2-3057-42b9-9464-b85fd6850f09/saputixuj.pdfIn PDF document text
    • http://pidejejorojomon.epizy.com/what_is_a_scientific_apparatus_meaning.pdfIn PDF document text
    • https://05790d5e-93e9-4545-bcc4-99c37f081c18.filesusr.com/ugd/bff4d5_77d4c9e2515f47da933aa652a61f88ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/26cf9e66-1c16-4c83-a673-3a32ef1c2e51/salesforce_developer_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da10542-25db-4585-8282-56ea9d171b21/g_shock_mudman_strap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/839ad784-6501-4e9e-90f2-5d99fc438a93/kugasubovamezox.pdfIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_f7abf65ae696418fa4d012572e1e1a83.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_off0000e69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69E 5292 bytes
SHA-256: a6bf6f804be6a93bd2e4d2498c012d526e41bd4578aa61bf103ad31a61c1359f
font_01_sfnt_off0000f882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF882 12832 bytes
SHA-256: c8109461e030e26bc827662bc08944a5316ccc5033b243483b136db9980ffbfd

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