Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9254bd6642ffae4…

MALICIOUS

PDF

142.3 KB Created: 2021-03-11 07:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9bb37e4a3e0b15fa8831a04d69cfb07f SHA-1: 93b55589b1c38b98ba2b4f8f268819abf5a044cd SHA-256: f9254bd6642ffae413173922482abc9a746eaf8e8e6f09a9ba167225cb89bdf6
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it is part of a link farm designed to generate traffic or distribute malicious content. The primary URL, https://lozipotod.ru/award?keyword=sacred+cacti+and+some+selected+succulents+pdf, is suspicious and likely leads to a phishing or spam page. While no scripts were directly extracted, the nature of the link farm and the ClamAV detection suggest a malicious intent, possibly related to 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 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.
  • 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://lozipotod.ru/award?keyword=sacred+cacti+and+some+selected+succulents+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408324/normal_603822d06b5b4.pdfIn PDF document text
    • http://gallery-shop.site/happy_teachers_day_greeting_card_imagecvh75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460968/normal_600eb8a95cb00.pdfIn PDF document text
    • http://vomidujoma.scienceontheweb.net/what_is_the_purpose_of_the_bevel_on_a_needle_tip.pdfIn PDF document text
    • http://rimka.xyz/beats_by_dre_best_buy_saleohri5.pdfIn PDF document text
    • http://nnorm-id.com/24372245900hrohv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459176/normal_603ba563bbb9d.pdfIn PDF document text
    • http://clubstore.pro/free_certificate_of_achievement_award_templatef50fd.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/gedijedixobovikevokoxiseg86o1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/baal_veer_3gp_2015.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_50bd516f27f748ecbc2e8c2a0c890186.pdf?index=trueIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_0b3f38bab85a4cebb5b01e6a64b7b499.pdf?index=trueIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_bf6c16f89b2f4279b0173cc91d9a298d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitok/difference_of_cubes_examples_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/best_android_phones_2018_verizon.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/solole.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/before_and_after_pictures_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/vocalizeu_lite_apk.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/7147178378.pdfIn PDF document text
    • https://c1e7300b-80c0-415c-b28f-1ac330235641.filesusr.com/ugd/8b97dd_36da1528e1fe4d2e8051e5c881e8325a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/oxford_dictionary_of_literary_terms.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_off0001e468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E468 5404 bytes
SHA-256: 26ad6684f958a97d3947c902c3372ca112cceea185a620dcc03d356ae1b1dedd
font_01_sfnt_off0001f6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F6B3 17048 bytes
SHA-256: 2522818adfc971dc17e3ba86714d598764a3f5922fccdc155aa7f658544e2152

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