Malicious PDF — malware analysis report

Static analysis result for SHA-256 e346b251d445dc67…

MALICIOUS

PDF

79.2 KB Created: 2021-03-21 23:48:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9d6dceb828fcf28ab1e4581e022fe6e5 SHA-1: 082ee0433bbbc76c7cf7c1f5dedb3d38445c8ba9 SHA-256: e346b251d445dc67484f3aa63659461f63f1a13834a8510700a44b79594a5260
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO redirectors, suggesting a phishing or scam attempt. The heuristic PDF_SEO_LINK_FARM indicates a large number of links, and PDF_SEO_UTM_REDIRECTOR_LINK specifically points to a lure for free downloads or phishing. The ML classifier and ClamAV detection further support the malicious nature of the file, likely serving as a lure to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://zajinet.ru/123?utm_term=incident+report+form+for+schools PDF link annotation
    • http://xuxetosufuzo.getenjoyment.net/48847834465.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/how_does_the_ability_to_interpret_the_constitution_limit_congressional.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/yamaha_av_receiver_htr-5740.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/how_to_sign_up_for_salvation_army_christmas_assistance.pdfIn PDF document text
    • http://sinomefonok.mywebcommunity.org/3809650470.pdfIn PDF document text
    • http://zaxiluxedexu.getenjoyment.net/skoda_kodiaq_specs.pdfIn PDF document text
    • http://finomimetafix.sportsontheweb.net/love_story_movie_2019_new_release.pdfIn PDF document text
    • http://zenajok.medianewsonline.com/bsc_math_honours_book_download.pdfIn PDF document text
    • http://vevovifox.scienceontheweb.net/65798161789.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/jejuvekazidubebaw.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/change_management_competency_examples.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nakevoja/dawn_of_warriors_android_guide.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_dd027b8d36144e43909bf96abe0d96e4.pdf?index=trueIn PDF document text
    • http://betakudo.atwebpages.com/tafewofisalotozed.pdfIn PDF document text
    • http://vifidumefitur.atwebpages.com/brunswick_string_pinsetter_cost.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/22885242337.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/lenojezufopanudokepevan.pdfIn PDF document text
    • https://9610c43f-1b2a-4a8a-b660-75aaf3908198.filesusr.com/ugd/286fb8_4dd1d5094f6f4923b3cbadd23f8194a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/amazon_ninja_air_fryer_recipe_book.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/wd_my_cloud_android_app_alternative.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/82917877389.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/pdp_afterglow_ag_9_wireless_headset_ps4.pdfIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_a19db5426047442ba377069c935a04a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/lufipuzurimapinujudegelir.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0B 4908 bytes
SHA-256: cf831ad84aec4eaf09a2982af4a972507361e68483416ae212eb98ff53bee642
font_01_sfnt_off0000fb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7A 10456 bytes
SHA-256: 985799902bd266a8b32082701c992655d3a85edb58402f87d415b5577cb08c8e
font_02_sfnt_off00011f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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