Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ab9b31b34dfdaf…

MALICIOUS

PDF

80.7 KB Created: 2021-06-07 12:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e8436436fd9ddd8728d1d4390cf614cd SHA-1: e4519401d30f8482f44e05ff643bb291202ef67f SHA-256: f7ab9b31b34dfdaf89f7141e14adaa163995b7ea0d801f6e5477214aa3d97d9d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded links, with one prominent URL leading to 'maypoin.ru', a domain associated with malicious activity. The document body, though heavily obfuscated, contains keywords related to game downloads, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/123?utm_term=angry+birds+games++for+windows+10 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413362/normal_5ffe8ced1d424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470836/normal_604d4d1beb49c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485153/normal_5fd88fd9ccaf8.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://garigor.pbworks.com/w/file/fetch/144427437/tajiximewazuxoladeniwiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a6208c-f0a6-45bd-af8a-3ebc66a2e0ef/interior_and_exterior_angles_of_polygons_maze_answer_key.pdfIn PDF document text
    • http://momoruxoxim.pbworks.com/w/file/fetch/144775671/sugar_baby_profile_examples_tumblr.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144414753/satyanarayana_swamy_vratham_pooja_in_telugu_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40cb6ca-1883-4fe8-a2ec-c26da965a999/what_is_culturally_safe_nursing_practice.pdfIn PDF document text
    • http://gaguseka.pbworks.com/f/26609883324.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/najarokovutoberipus.pdfIn PDF document text
    • http://zupelapowi.pbworks.com/f/mozilla_firefox_latest_version_67_download_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386ea9df-30c7-442d-b8a9-ee6ad520546f/23069381564.pdfIn PDF document text
    • http://denipugo.pbworks.com/f/lakixagebol.pdfIn PDF document text
    • http://vulazojab.pbworks.com/w/file/fetch/144575271/how_to_change_battery_in_garmin_vivosmart_hr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363533da-6937-43ef-bb88-f083b57b9506/best_truck_driving_schools_in_new_york.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3293b26f-f894-4fec-8833-c7f97c6c8ff6/82879622164.pdfIn PDF document text
    • http://zixawedeg.pbworks.com/f/1997_kawasaki_vulcan_800_owners_manual.pdfIn PDF document text
    • http://zosajivapesi.pbworks.com/f/preterite_tense_of_ser_and_ir_worksheet_answers.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/f/is_miraculous_ladybug_on_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0526ec8-f5f5-4288-a067-4c88062710c7/65251983813.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_off0000f0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A2 5420 bytes
SHA-256: 9cfa14d3dbaafee50a0729b8b02c7a0d991a7dc85d25dc00593de65c2b167f8e
font_01_sfnt_off00010301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10301 10620 bytes
SHA-256: a0a319f902ff88b74d55a6608d3c0350fa014f576b6d0ceee73a6292172cf96b
font_02_sfnt_off00012715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12715 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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