Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc32a681750722c2…

MALICIOUS

PDF

70.4 KB Created: 2021-03-19 17:05:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3b8d0faf4c15eddbec0ca7ce5ebb5c0d SHA-1: dfd21e2da97968288ff22251e32a900a9bef9e9a SHA-256: cc32a681750722c2a6104aa85912e97007c926ffa84a636594f61bb3fa747bb8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a domain that appears to be hosting a phishing lure. The PDF's structure and the presence of external URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/award?keyword=the+vulture+is+a+patient+bird+pdf+download PDF link annotation
    • http://tebapewulodafe.getenjoyment.net/xabufatelulud.pdfIn PDF document text
    • http://kopatizukuxaluj.scienceontheweb.net/78979518022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_6012c56be9bce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379720/normal_5ff8163b35abc.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/jorge_luis_borges_sus_principales_obras.pdfIn PDF document text
    • http://leledup.mypressonline.com/what_does_the_term_strength_of_character_mean.pdfIn PDF document text
    • http://linodogeb.scienceontheweb.net/daxuwoputakitijinow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392474/normal_60281ce99a219.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417426/normal_5ff633f8cae55.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/how_to_cure_pimples_on_my_nose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_e9763fb94fa946fe96d8a9c1ac99ca78.pdf?index=trueIn PDF document text
    • http://sakogabutal.onlinewebshop.net/gumipofotixiva.pdfIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_9f206f12d17c4cda9afe1c60303bb2c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/how_to_measure_chest_size_for_womens_clothing.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/gewusijalowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c769e2a-673d-4790-bbae-5afca52ca38b/84484969249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d450fe-1d1d-4ca1-ae5c-b6d8763022dd/material_science_degree_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f953d97f-62c5-420e-81b0-c8ca263fb559/pathfinder_kingmaker_ps4_review_ign.pdfIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_b5a19e9f644c472aa053a59234767a9b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8557f8-6af5-4032-908c-0d525fdf5b80/3175646723.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/firojewodorad.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/business_model_analysis_for_entrepreneurs_eisenmann.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/trial_balance_exercises_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c642eb48-aed8-4580-8b32-1bb081af27a5/diamond_infinite_edge_vs_sb-1.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_off0000d0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EF 5368 bytes
SHA-256: cecf177bcbc0c79eddf940e7a7fbdd00a1b6ea107f94750fb0873b3a22c26247
font_01_sfnt_off0000e335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE335 12100 bytes
SHA-256: d62e3567243fa197dd856f986baa61ae36b04cbd3c0897763a7faaffe8435c49