Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7dd2f17f3c255cf…

MALICIOUS

PDF

74.4 KB Created: 2021-04-18 07:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3fe669a749ba459c7a1c1cd7a52d8d4d SHA-1: 1fbe8d890a9ae643aa20b2638d546e9addb888c4 SHA-256: f7dd2f17f3c255cf1e7a5750461b6e37567227957f5e1a92302f1136de2c3936
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://mezovuduw.ru/strik?utm_term=my+passport+ultra+does+not+show+up+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377663/normal_5fe955e128295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404512/normal_603f51135777f.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/how_to_use_ge_gas_self_cleaning_oven.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/hijifat/blood_on_my_money_future_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/nivavepe/ihuichO/happy_jumpy_cd_victoria.pdfIn PDF document text
    • http://megivisu.22web.org/19117187230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_606e8f4b41d1f.pdfIn PDF document text
    • http://gevenukodujojov.getenjoyment.net/zusobisapajew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492286/normal_5fe1a32b1a85d.pdfIn PDF document text
    • http://gazzsheff.xyz/wwe_smackdown_2020uzv36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_6021cc4c826d6.pdfIn PDF document text
    • https://cdn.sqhk.co/novoganug/dheijjV/ghost_hunter_house_simulator_quest.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/triumph_thruxton_900_service_manualx9pat.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/uLib1hd/colour_hole_3d_play_online.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/revolutionary_iran_michael_axworthy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://solugivewatewa.myartsonline.com/fill_in_the_blanks_with_appropriate_words.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_21d0c576b0254eccbb009fcc9090138a.pdf?index=trueIn PDF document text
    • http://mawabubobiniz.rf.gd/ashes_cricket_2009_wii_iso.pdfIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_8c7590dc8ee14acf8c9297aad9976ff0.pdf?index=trueIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_6665ffac3b4249369bf3eefe5a4f0177.pdf?index=trueIn PDF document text
    • https://e5058785-d3d1-442e-b0ad-d0045053dde7.filesusr.com/ugd/17c622_0bfa2d71b1614e60ac6d9bcda208ea11.pdf?index=trueIn PDF document text
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_7cbadb9c7bb04b5c8f3f4753718afb16.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_off0000e221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE221 5512 bytes
SHA-256: b62c3430c724681f99695f790698e9a6825b9009b3eb4055bfbb661d9f46afe1
font_01_sfnt_off0000f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 10900 bytes
SHA-256: 5c49f917210acb410803391fa990cbb347fe492222680bd492573b017c6b6c9d

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