Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a3375163d1515ee…

MALICIOUS

PDF

75.0 KB Created: 2021-03-03 04:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3824e5f8a67e9493a547f09107f2ebcd SHA-1: efa9c0981e57f45c1c82d3a79f3d5b1d8b80e136 SHA-256: 9a3375163d1515eef60bb9f05ca9960e1deb707eaa040bed74731b7e52117d3d
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to job descriptions, likely intended to trick users into clicking the malicious links.

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/strik?utm_term=what+is+a+public+relations+assistant+job+description PDF link annotation
    • http://topcreditcheck.info/gusugobulokibobalosewukedg0vl.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/how_to_get_darkvision_5e.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/pirates_of_the_caribbean_davy_jones_piano_music_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385633/normal_5ff2beec70658.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/beats_solo_pro_wireless_vs_bose_quietcomfort_35.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/31166917040.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/classical_guitar_tabs_free.pdfIn PDF document text
    • http://xakaderinetatu.mygamesonline.org/o_que_cai_em_historia_no_enem_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_601f0d178ecf7.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/gepixe.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/u_verse_remote_wont_turn_on_samsung_tv.pdfIn PDF document text
    • http://timinome.getenjoyment.net/dipofojob.pdfIn PDF document text
    • http://lnstagramsecurity.net/commas_worksheets_for_grade_6ubdbv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nijarigu.onlinewebshop.net/36443338926.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/robert_half_finance_accounting_salary_guide.pdfIn PDF document text
    • http://kesupipipiret.onlinewebshop.net/62066990626.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_off0000e6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D0 5392 bytes
SHA-256: 208b818370b7df981937d466ab1e82a1bd43f0f06f9583c85d7c85a462117e9f
font_01_sfnt_off0000f921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF921 10844 bytes
SHA-256: d39a5fd6b0cd0494db131de95510d7f7818c13a170f0d5bc1fc36b6d123d2b59

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