Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0a6936a00d6499…

MALICIOUS

PDF

90.9 KB Created: 2021-03-20 23:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 42c6e88edd44092f71b33338f1542b5a SHA-1: ce7465c5d6574321720f2dc74b75a18ea2e8bdf2 SHA-256: 4e0a6936a00d64998c3c352f32ae6f966a82723878fd286e7ac2ec8723c02445
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to a link farm on disposable hosting, suggesting an attempt to redirect users to potentially harmful sites. The presence of embedded URLs further supports this, indicating the document is designed to facilitate access to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/award?keyword=anova+interpretation+spss+pdf PDF link annotation
    • http://burrrhey.tech/learn_android_programming_step_by_step_free_onlinegd4y5.pdfIn PDF document text
    • https://jatevabuxises.weebly.com/uploads/1/3/5/3/135382810/5657031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482860/normal_6010a580cdf76.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/TM51ngi/boss_clicker_act_2.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/FrzDigp/83896595084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_60201ba51153d.pdfIn PDF document text
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/87127eb29a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496391/normal_604b417ccea46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464327/normal_602672b4ba02c.pdfIn PDF document text
    • https://nasoluludeg.weebly.com/uploads/1/3/4/4/134435301/8455509.pdfIn PDF document text
    • http://sentytld.online/32735309011c5m2o.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/GijLjfz/time_traveler_movie_2002.pdfIn PDF document text
    • http://instapriz.site/51172900198hge78.pdfIn PDF document text
    • http://b0xberry.online/interactive_project_management_booksj0cg1.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/jenisozazewubo/how_to_treat_piriformis_syndrome_naturally.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56cfa8f0-fe26-4d27-b15a-3e5346c88e86/what_does_mundo_mean_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70130ae7-dbf1-4544-9e37-dcc77cc443f7/semujaz.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/66904469385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e9d7d0a-f259-4dad-a958-42d6a8321268/92558173148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06bc297-7d17-4375-91a8-e8ec63efaa6d/do_short_term_traders_make_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e23cda-ed86-4b64-aef2-823a3e597729/94139727522.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_off000127f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F5 5052 bytes
SHA-256: e74c7b86390fd5b3e77b739abd541d218f559608778e46d337dafb3584ef101e
font_01_sfnt_off0001393d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1393D 11284 bytes
SHA-256: add72bdd8ccea6a309ca7fa1e02b8a5a06a7d028fc379bb629898e054b5d2bba

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