Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86793576c29fa89…

MALICIOUS

PDF

190.1 KB Created: 2021-06-10 11:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: caf14ccda20b1000a4712938690a5f6e SHA-1: 9768170b1bb2cc6c30f63ac8ee9c025ff155619f SHA-256: f86793576c29fa899c093c441816fb0e9b54d1a8d205d04b5293cd1e049cd824
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URLs and the 'utm_term' parameter in one of the URLs suggest a phishing or malicious content lure, likely related to movie downloads. The document body, though heavily obfuscated, contains text that appears to be a lure for movie downloads, reinforcing the phishing attack pattern.

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://krisoc.ru/pbw?utm_term=fast+and+furious+8+full+movie+tamil PDF link annotation
    • https://fudamugifotud.weebly.com/uploads/1/3/5/3/135323440/4b2e6f9e31.pdfIn PDF document text
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/365cc9596452.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luwivaj.pbworks.com/f/driving_license_exam_download.pdfIn PDF document text
    • http://bukafag.pbworks.com/f/52879552411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e71966-a3c9-4dc2-a913-a598ea35d0a3/roomba_960_battery_charging.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/w/file/fetch/144607101/91637670065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca8946ac-46a4-4824-80d8-4377d4c5167f/72953208243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb84b37c-cfb2-4e70-836f-5a9be365a6b5/tipos_de_fichas_biograficas_ejemplos.pdfIn PDF document text
    • http://misabovu.pbworks.com/f/historia_de_romeo_y_julieta_resumen_corto.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/f/hardest_friends_questions_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ea1516-55cc-49ab-9ee8-5e6fe466c4d7/what_questions_are_asked_in_a_police_psychological_evaluation.pdfIn PDF document text
    • http://laxaxufudej.pbworks.com/f/chopin_c_minor_nocturne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7625f65d-36f5-403b-bdf4-fc1ed7ad09e0/visiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4413d9ab-f770-4945-9572-c1de319c9cb9/how_long_does_a_40_volt_lawn_mower_battery_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e08ae4-7156-42e4-b4f3-a8887457f652/kalibalaxa.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26A88 15172 bytes
SHA-256: 3e355c19090a734b90a62b30f1e494b1dc6480cec5edfee552df70e121639b81
font_01_sfnt_off00029c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29C67 5260 bytes
SHA-256: 6869639fb0f317094557aa4d664afdf7cbdf0b13d60b5e8cdd609efc1b71f755
font_02_sfnt_off0002ae40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE40 13832 bytes
SHA-256: b4e1027ad5f1f5b9c399e0df3594a596f06d1d1ca35d7004473d572c3b5039cc
font_03_sfnt_off0002dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DBCB 16112 bytes
SHA-256: 23e5e0a6ad5360bf10628433507e5aab34c42d7d900ccb2a5214949f2168b422

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