Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d1bd7bb95dd806…

MALICIOUS

PDF

80.0 KB Created: 2021-03-18 09:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6d61d050ecb18b805847022e32c74c1 SHA-1: decdffa20074bee78bbbe7a8fda17b55a4474ae0 SHA-256: b0d1bd7bb95dd80627f1e86d3af41c8d24dee8235db402ad08bccc1b8b471561
186 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/wix?keyword=adb+freelancer+apk+download
    • https://fomutifimo.weebly.com/uploads/1/3/4/5/134594787/xujigoba-tozinowope-daxidu.pdf
    • https://nalufubuxozukex.weebly.com/uploads/1/3/4/4/134479837/d8c62a7c310.pdf
    • https://cdn.sqhk.co/loxepafigav/hhbriha/theatrical_elements_definition_literature.pdf
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/fudogifipilipa.pdf
    • http://supusatode.sportsontheweb.net/85637916986.pdf
    • http://xariketixagat.mypressonline.com/78228717210.pdf
    • https://cdn.sqhk.co/pasepizut/jjfhhja/worlds_biggest_crossword_answers_level_2.pdf
    • http://pivolirarorip.mypressonline.com/oxford_style_shirt_blue.pdf
    • http://fijazubelanulek.mywebcommunity.org/bahamas_visa_application.pdf
    • https://xubejuvanexog.weebly.com/uploads/1/3/5/3/135311054/2088cf7.pdf
    • https://cdn.sqhk.co/dusaradezat/wgegeJJ/street_fighter_4_champion_edition_android_apk_full.pdf
    • https://cdn.sqhk.co/gafazakedoki/Vhghaia/tasigusadarizokopa.pdf
    • http://fafesixokegigi.getenjoyment.net/novuluridikikuve.pdf
    • https://cdn.sqhk.co/jabakujivim/vXidAdY/xewiva.pdf
    • http://bikizugupaka.iblogger.org/autocad_learn_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_66dc5f27d66e4de79aa4d2fa49f2be3b.pdf?index=true
    • https://f39f7cea-6337-46de-af4f-699959e6db0a.filesusr.com/ugd/004672_f69858a906c641a9b5a7fd085daa1846.pdf?index=true
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_e5749febc24f41279b060ec1560de7f7.pdf?index=true
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_6e7f8a31dca94b44bcf3d1aed927abf6.pdf?index=true
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_55b8e3421daa4520b9b3abe092306051.pdf?index=true
    • http://sorebetole.epizy.com/is_airbnb_safe_during_covid.pdf
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_121c9adfd725430cb2f0c28dc0163922.pdf?index=true
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_9267ca5e97f94ff5b971446a1902c7de.pdf?index=true
    • http://kimamewaseziwal.epizy.com/common_core_anchor_standards.pdf
    • http://sitiwaruto.rf.gd/fake_caller_id_apk_2019.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f974.bin
c8403253ace1597b1d15a4dd9619663cabdf6a70bbe37a706f19ed9727c26d4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF974 5256 bytes
font_01_sfnt_off00010b74.bin
c3972b2b7291846e258b69be1c8fd0c869647da373cb0b5ab81e082ec44bfa00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B74 11272 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.