Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0321c6ba348243…

MALICIOUS

PDF

76.5 KB Created: 2021-04-04 13:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e9a151b07049cdd8910b3f8c4486393e SHA-1: 50e83d6542c0adc1d28624a42e7ae64ee477ca10 SHA-256: fd0321c6ba3482432892cd724032060b2fbcc810a6da892e6c0df5b80d33b480
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier, indicating it's a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to 'social media platform usage stats'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vilenefex.ru/123?utm_term=social+media+platform+usage+stats PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493209/normal_5fe4b73c2751c.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/how_to_make_a_paper_folded_stary4gmi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449776/normal_5fe61c0b89ef3.pdfIn PDF document text
    • http://latencfsrt.space/67205267531awlzg.pdfIn PDF document text
    • http://life50it.pro/715713466ad63s.pdfIn PDF document text
    • http://moneymaya.site/51101772289qmtdp.pdfIn PDF document text
    • http://help-verification.com/the_house_on_mango_street_audiobook_introductionms0ra.pdfIn PDF document text
    • http://rabiwitijif.medianewsonline.com/3369232180.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5ff7ebabddd37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_606961e7a4527.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/3419840372.pdfIn PDF document text
    • http://nubuxeki.scienceontheweb.net/brian_tracy_maximum_achievement.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6176595-4959-4322-b845-c5ff2bd7cba6/cisco_sg300_default_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb64a62-efc3-4ab0-913b-33a3b53f0708/bunn_axiom_series_cleaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f0d5c6-916f-421f-a3d9-f6950c422b0d/how_do_i_add_positive_and_negative_numbers_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/217e01bf-a3da-425c-a25f-74a986eb4b62/harry_potter_patronus_quiz_wizardmore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c79a1b4-f85e-49a2-a18a-79086a042d7b/mechanical_engineer_salary_per_hour_in_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6964f926-0e48-475e-aa57-c058997b0d20/the_holy_quran_book_online.pdfIn PDF document text
    • http://rixigor.onlinewebshop.net/87862506693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a05c69-8740-458c-91f2-6c6b88a0eb98/xosewibono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b8ee2c-cd8d-4bdf-bf46-2bef0495d54e/69782720732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8c519cc-423e-4957-8f9d-ec975f73c2f2/do_lifters_help_with_deadlifts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/672cb51b-b0ea-4ae5-9768-2d7e2b33bd0f/bijipobavopufoke.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_off0000ec8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8A 5580 bytes
SHA-256: e28cb903a5a8b086f42b9200f848c764ca1f65bbb4011fbc803e5b41b49ca93f
font_01_sfnt_off0000ff6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6F 10800 bytes
SHA-256: 863a286d01943a55c6d251a5a6612cfcdf70f3546fceee0abd07d8a85e74cc27

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