Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19a4c0d69cabbf3…

MALICIOUS

PDF

88.0 KB Created: 2021-04-06 19:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b307aa7459773cbd62f5564880e652cc SHA-1: b358230d1d0b324e0fa99a4226a57acc91860be9 SHA-256: f19a4c0d69cabbf3d5effd55585bdf8deb2674378412f93bda85ba9f53115b0e
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a non-clustered link farm on disposable hosting, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=5+themes+of+geography+italy+prezi PDF link annotation
    • http://gisejol.iblogger.org/sozutelobenorarasow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470825/normal_60182ffe1a286.pdfIn PDF document text
    • https://cdn.sqhk.co/reserujaj/8qihgeO/migokunobaragujovagome.pdfIn PDF document text
    • http://instup.xyz/training_manual_templates_free_downloado79v5.pdfIn PDF document text
    • http://rapegutuxipik.22web.org/al_quran_taj_company_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/AjiaCid/online_auction_sites_cleveland_ohio.pdfIn PDF document text
    • http://policyhelpcenter.com/magic_cube_nicer_dicer_review2x6rm.pdfIn PDF document text
    • https://cdn.sqhk.co/vovusupa/jjaOghK/the_world_ends_with_you_switch_metacritic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451018/normal_606059a5f2fa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447878/normal_606a6e80a5156.pdfIn PDF document text
    • http://limecash.xyz/apc_back_ups_rs_1500_manualehlb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473041/normal_5fcad12a53e29.pdfIn PDF document text
    • http://dk-inc.xyz/fajizodowe39men.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a04ad255-06d6-4b17-97e7-91173d300295.filesusr.com/ugd/6864df_1300b63707a841cf8e1586c09d04de59.pdf?index=trueIn PDF document text
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_bccb903c079b40fa81ffb7b56750fa07.pdf?index=trueIn PDF document text
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_9de88d657b0e4f448ec47b50942c2333.pdf?index=trueIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_f9e939e4f10441d583e6e522084414e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/366e6efc-fea0-490c-beba-fff7593fec62/asus_p8z77-v_lk_windows_10.pdfIn PDF document text
    • http://logoroxesum.epizy.com/ara2_bula.pdfIn PDF document text
    • http://warepeg.rf.gd/bhagavad_gita_quotes_in_tamil_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3a3fb4-17a0-4bb1-a40b-4d5a0b86bd50/delonghi_2000w_ceramic_heater_review.pdfIn PDF document text
    • http://potefedezazox.rf.gd/bapupajig.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_off0001198c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198C 5496 bytes
SHA-256: 0f44cad60445e2aae93a3601849f71055ffc8a83d2e27bd60bb4cf92b1c45ef7
font_01_sfnt_off00012c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C23 11236 bytes
SHA-256: 7d3e6077f61668c8906c924776c89636589148f287302e780cbfe9403e95e01c

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