Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ba0c817dfd40e3…

MALICIOUS

PDF

67.1 KB Created: 2021-04-11 15:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bed741dac8105f77f44a4be1bf8519b1 SHA-1: 733c2cce7e0b758969367a207e3eac31611eb1be SHA-256: 00ba0c817dfd40e3bccf5522cc5e24a8cc65b693660e6fc88abec5d3335bfc80
134 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file. The document body's content, combined with the heuristic findings, suggests a lure related to Walmart pharmacy login, likely to trick users into providing credentials or downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jumiwimov.ru/strik?utm_term=walmart+pharmacy+guest+login
    • http://tizakeguwowil.22web.org/house_bunny_movie_free.pdf
    • http://divuwon.iblogger.org/free_excel_spreadsheet_for_household_budget.pdf
    • http://vinnipoh.space/23936334833rt8sy.pdf
    • http://pixelbarista.com/13693842824zf57u.pdf
    • https://cdn-cms.f-static.net/uploads/4482027/normal_606dc23ff2c0c.pdf
    • http://card2card.live/writing_sample_for_phd_applicationkoq7l.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kepujelibip.epizy.com/63668163279.pdf
    • http://xonifovozub.epizy.com/international_criminal_law_handbook.pdf
    • https://uploads.strikinglycdn.com/files/5732bd3f-d0cc-4fe0-9239-31ecdef773ff/kojezulupixoxesemiboxup.pdf
    • https://uploads.strikinglycdn.com/files/0b36d489-54d9-4721-90f2-99d0c61ee6e2/depefowewu.pdf
    • http://samanofi.epizy.com/lakuxosotirobukaposobute.pdf
    • http://roxewew.epizy.com/multiple_choice_questions_and_answers_on_strength_of_materials.pdf
    • http://pazalijof.epizy.com/cardioversion_documentation_guidelines.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_off0000c8ba.bin
372144c860eba3fd99b3ae089fec089145bc7b2fdcb20bbbd2596c1db16638a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BA 5464 bytes
font_01_sfnt_off0000db38.bin
d9915232d1c81de54f132dafae4250c13cde9f6948c15bac62d624ea84ab749c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB38 10300 bytes

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