Malicious PDF — malware analysis report

Static analysis result for SHA-256 4895a4a3b92c4025…

MALICIOUS

PDF

83.0 KB Created: 2021-04-01 22:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 17b6e78dfd48fd76421f7a5eea4a8551 SHA-1: 6852306e13a687a8a027b20a4143cff447e6b936 SHA-256: 4895a4a3b92c402565fe4211db68cb23030053029d469c1fe37493cbdf8d9033
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary URL pointing to 'fokemale.ru' which is flagged as suspicious. Heuristics indicate the PDF acts as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://fokemale.ru/award?keyword=pdf+editor+erase+text+online PDF link annotation
    • http://dusakopu.iblogger.org/pidotodoziwolofu.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/CXUhvge/freeze_drying_amazon.pdfIn PDF document text
    • http://chestlune.online/paxuzekedatifipugovijadiwm0ljn.pdfIn PDF document text
    • http://creditchecktotal.info/bloons_tower_defence_6_guidepjrjd.pdfIn PDF document text
    • http://vipmanmarket.space/penazavitawejuverigusjv3z.pdfIn PDF document text
    • http://kumokopilomeme.22web.org/71448156025.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/vkU6gge/alabama_road_trip_map_animation.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/jfhbAhf/photo_collage_app_free_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/nemisova/he1hcgf/44041603137.pdfIn PDF document text
    • http://bazis-rostov.com/python_android_app_development_beewarenk1p1.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/2Esjcge/55816869587.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rozesefotuduwef.epizy.com/enfermedad_de_chagas.pdfIn PDF document text
    • http://wadabegamubezo.epizy.com/features_of_wind_erosion_and_deposition.pdfIn PDF document text
    • http://bibirosomuxir.epizy.com/77232518961.pdfIn PDF document text
    • http://fujatelet.epizy.com/tujanetawerepaduxafunedi.pdfIn PDF document text
    • http://xonelamurojili.rf.gd/41956632115.pdfIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_ba7b81a22ca549f18e8cb6c993d320f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widuxade/94178795639.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/tutam.pdfIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_6178962cb1204f55be533b799942e30a.pdf?index=trueIn PDF document text
    • http://jenefidozepojig.epizy.com/pezosikawezumew.pdfIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_79ea0fbb117f4496a72ffcc8ec32ed2a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/ravubugotezik.pdfIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_17c6fb8a57a4487ebcbf262a2dfd990b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/weroramovimimiwasikiba.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_7d4544d170c743249ba2ea5d7b31858f.pdf?index=trueIn 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_off00010479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10479 4968 bytes
SHA-256: d89c4dead52d62394f2e7f533b8539883fe90175661f990b40e548e2facc6987
font_01_sfnt_off00011572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11572 11428 bytes
SHA-256: d1a8ca916aaa7b87a706fa4170aa585728fdbc961f273996051905109b2e1a5c