Malicious PDF — malware analysis report

Static analysis result for SHA-256 9212b24bc19fbe40…

MALICIOUS

PDF

81.3 KB Created: 2021-02-25 19:08:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 131d56bd0e791f2295e48fca924137d9 SHA-1: 85968db6ae6cd89e3cc702123b93b65649e6fe4a SHA-256: 9212b24bc19fbe40969e9de0c13dae32745b0419ac5ae9f3301ed0e783e40d2d
174 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and exhibits characteristics of a link farm. The presence of urgency language in the document body, combined with the ML classifier and ClamAV detection, strongly indicates a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/123?utm_term=after+anna+todd+series+set PDF link annotation
    • https://litolojinoforiw.weebly.com/uploads/1/3/4/7/134721995/1736732.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/how_to_export_midi_tracks_from_garageband.pdfIn macro / runtime command snippet
    • https://rovetizewi.weebly.com/uploads/1/3/0/7/130776299/kasosuzotu.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/tomorrow_when_the_war_began_cast_tv.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/40260919398.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/h1ojaym/gesuvusibefij.pdfIn PDF document text
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/woluto_diguvi_wuduvaparutanuf_kipafonozuj.pdfIn PDF document text
    • https://cdn.sqhk.co/pimabosi/geggham/30839092961.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/43444150781.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/icom_ic_207h_programming_software.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/black_and_decker_crisp_n_bake_air_fry_toaster_oven_reviews.pdfIn PDF document text
    • https://litolojinIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jobavo/82834042914.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/78967013886.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/does_sat_physics_have_formula_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/30709861457.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/jazemozus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43F 4856 bytes
SHA-256: fb0f256d22aec18a05eace067d6d09846de76a4c5999b9ea05e7b5e246e23679
font_01_sfnt_off000104cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CD 2944 bytes
SHA-256: c452ffe4ac368949a52d8ae13bbf28a82440802df70936981f0b1db29a734ebf
font_02_sfnt_off00010ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED5 12692 bytes
SHA-256: b13031e46a564165e18ebadfa863a9312cbd0629eb4f082b8e636c40dd6c63d6

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