Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37e75e0f3da066a…

MALICIOUS

PDF

78.7 KB Created: 2021-05-18 21:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9c4b3e56586e3c214119a5eba2aa8c09 SHA-1: a37700f31b81f149b26640a54c1d3fb818285433 SHA-256: f37e75e0f3da066a14b3310d5ba95b043c604f819171035d5ab7261706a1c7bc
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to contain metadata related to wkhtmltopdf and a document title, likely a lure to disguise the malicious intent of redirecting the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=giraudoux+la+guerre+de+troie+n%2527aura+pas+lieu+resume PDF link annotation
    • http://tokigarodam.22web.org/easy_flute_sheet_music_popular_songs_free.pdfIn PDF document text
    • https://zejafopo.weebly.com/uploads/1/3/4/5/134505046/sutakukuwidiwif.pdfIn PDF document text
    • https://tavebesu.weebly.com/uploads/1/3/1/3/131381332/zamukoxizezene-sadegi-mufofokipodo.pdfIn PDF document text
    • http://jigezemomesetez.iblogger.org/24600141935.pdfIn PDF document text
    • http://luzutilili.iblogger.org/98945157267.pdfIn PDF document text
    • https://lulipelewofepo.weebly.com/uploads/1/3/0/8/130873877/7961218.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/ced0120171.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/lupawi-tozibe.pdfIn PDF document text
    • https://xixefofitajeres.weebly.com/uploads/1/3/3/9/133999179/sakaxetelebub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/2019_harley_davidson_touring_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/sri_rudram_meaning_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d10ad7-9c3c-4282-afec-4e96dad2bf2e/how_to_set_up_my_focusrite_scarlett_solo.pdfIn PDF document text
    • http://wetowotupime.rf.gd/tewagudidebakazevikuni.pdfIn PDF document text
    • http://lirepotinemos.rf.gd/nojelemewokaxaxasuj.pdfIn PDF document text
    • http://dusalotiwuje.rf.gd/ccnp_security_firewall.pdfIn PDF document text
    • http://topufopotu.epizy.com/43945874203.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/ablerex_ups_manual.pdfIn PDF document text
    • http://zijisulejemam.rf.gd/carl_rogers_theory_early_childhood_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d72bc72-4027-4a54-b712-f591536267fe/77674168732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55427c90-db79-46e5-91f4-c21467503b8b/wovep.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/maryland_magisterial_district_courts_docket_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/repiv.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_off0000f1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DB 5412 bytes
SHA-256: 9e2c3eae28638e7915cf0b7f5da947ec351c6e96cba067be8fcb1bea311da638
font_01_sfnt_off0001043e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043E 12456 bytes
SHA-256: 85b7c310ea850628d139c5c2f0ee251a0f54a2ef1fb8b65343ee98ce60398a0e

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