Malicious PDF — malware analysis report

Static analysis result for SHA-256 846a7d6c399ad982…

MALICIOUS

PDF

84.2 KB Created: 2021-03-05 07:03:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 844883d8414dfc013203ebdc33229c35 SHA-1: 7e11a81560ba7196abc6279dafc4671dac3f220b SHA-256: 846a7d6c399ad982666429968e9ab6b2238527ca1fd26cd7fff21d1c22f3c3f6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain keywords related to job searches, likely to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=environmental+safety+and+health+engineer+lockheed+martin+salary PDF link annotation
    • http://termometr-medikal.site/1896490010749b0j.pdfIn PDF document text
    • http://choosemadam.site/advertising_techniques_definitionmly94.pdfIn PDF document text
    • http://zupedaganivo.66ghz.com/78192151887.pdfIn PDF document text
    • http://cartest.pro/jinaramazaduv4cchs.pdfIn PDF document text
    • http://reduslim-italiaofficial.site/lynx_grills_downeytmn4e.pdfIn PDF document text
    • http://vsspb.ru/bofalidejajejiqju7.pdfIn PDF document text
    • http://jibuwuxopi.22web.org/xoxivozuk.pdfIn PDF document text
    • http://file-id.ru/category_management_bookgko7y.pdfIn PDF document text
    • http://bioforce-co.site/1507078104tfyl1.pdfIn PDF document text
    • http://aires.fun/duvovujvoruo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bojonovaja.rf.gd/namugivupuwusexetemep.pdfIn PDF document text
    • http://nupenujopufidi.epizy.com/fovamenimel.pdfIn PDF document text
    • http://tixipisorovebog.epizy.com/brother_mfc_j870dw_driver_is_unavailable.pdfIn PDF document text
    • https://d1ced4a1-fa29-4c66-b583-77209f32159a.filesusr.com/ugd/c88d8b_6562a67fc8bf428690f25caee061373a.pdf?index=trueIn PDF document text
    • http://duverakonu.rf.gd/honeywell_thermostat_cm907_user_guide.pdfIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_9f53c353876b4cbc9013f1b650705b58.pdf?index=trueIn PDF document text
    • http://zikinevubebera.epizy.com/achtste_groepers_huilen_niet_full_movie.pdfIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_689de73ebf9a47cd8293dbf35f423c2e.pdf?index=trueIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_01c081f0d19f43eda5cf92dc04083a31.pdf?index=trueIn PDF document text
    • https://e49cd12a-7e53-4a25-9f98-ae37b5ff2e44.filesusr.com/ugd/35dc59_ebaa1513a1c34f47a89207701877821e.pdf?index=trueIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_97bcc24aef7a4c96803e97d4b13ff98a.pdf?index=trueIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_b02abb0a5fee4a89bf7f84eafd43382d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF626 5404 bytes
SHA-256: f7241d49267e4142b2d5cf7f2135b2d96031b3b504d5e557be351cbf592d78d6
font_01_sfnt_off0001085f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085F 13800 bytes
SHA-256: 46b028d5f0217833f1b79cf1e45640fa9ec28a02661f72f684f8a7950ac76505
font_02_sfnt_off0001349b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.