Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f84ec3e150b2ff…

MALICIOUS

PDF

82.9 KB Created: 2021-03-25 15:20:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 380aa79625000489178e5f0f790c0252 SHA-1: 5b9fad947e39f8e5a8b5be762b2fdedd3663eff5 SHA-256: c0f84ec3e150b2fffb7e49a23c7ccd1ac05bd85032101b8aed4b405eebd1c0cc
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating an attempt to redirect users to malicious sites. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution scheme.

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://leonvi.ru/wix?keyword=marshmallow+launcher+apkpure PDF link annotation
    • https://cdn.sqhk.co/nedabuke/Orge1hj/88461953212.pdfIn PDF document text
    • http://amsidisi.xyz/arguably_hitchensgpy09.pdfIn PDF document text
    • http://xofozupazo.22web.org/xebumomigumegovu.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/gihjR7I/maze_runner_maze_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/KtIjbJj/trap_adventure_world_record.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/CKjfIgf/4848731080.pdfIn PDF document text
    • http://geramik.22web.org/fomibap.pdfIn PDF document text
    • http://fenellalucynelle.info/chinese_architecture_a_pictorial_historyomnjw.pdfIn PDF document text
    • https://cdn.sqhk.co/mavozopofug/rFsickK/pewdiepie_tuber_simulator_apk_hilesiz.pdfIn PDF document text
    • http://winsbig.space/34884952944rq5z5.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/iajdXzO/47648358665.pdfIn PDF document text
    • http://itdiscount.info/adding_and_subtracting_fractions_word_problems_with_like_denominatorsohecq.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/46045694287kttiv.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/tosevud/competitive_marketing_analysis_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad35a17-d3d7-4f15-b1de-974045ae8d36/dofevixekonevozotapijomij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8928f4c-c3af-41ed-acaa-77b75c763c61/mekasuwaxuje.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/hanuman_chalisa_bengali_song.pdfIn PDF document text
    • http://fufabufitilaf.epizy.com/dirt_devil_featherlite_deluxe_carpet_shampooer_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/weekly_lesson_plan_template_free_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6fd8a0b-8268-4afd-9179-aa6532b8ec0f/69369994612.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 5336 bytes
SHA-256: e445a111436a9329ca3df1fb9c72b784589894536eecb3d2efabf0c3cfe0aa50
font_01_sfnt_off0000fbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 13356 bytes
SHA-256: d381d6b07be00ae12df0d487535a96559dc3ea6b4a2ded8132751a268052c79e
font_02_sfnt_off0001260c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260C 16528 bytes
SHA-256: adb2426daa5f687cc5d7330f6cbcf7c53b804abc5015b42d5f714d44d378209f

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