Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e940e6c8ed90f6…

MALICIOUS

PDF

78.5 KB Created: 2021-03-15 21:30:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ec5f015fd37a238a10be6027aa66d041 SHA-1: 6d343f4bed134c0aaa3efa07f853ef9b9931baec SHA-256: 03e940e6c8ed90f6539368d61540783d115ff4304df58877720e245c5398c26d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by identifying the document as a link farm on disposable hosting, likely to obscure the true malicious destination.

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 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://bologen.ru/wix?keyword=big+sky+manual+espa%25C3%25B1ol PDF link annotation
    • https://tirokaroxere.weebly.com/uploads/1/3/2/7/132740449/0d6c4c.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/is_senior_class_president_capitalized.pdfIn PDF document text
    • http://pemewozeresozo.22web.org/honeywell_econoswitch_troubleshooting.pdfIn PDF document text
    • http://lagulatobir.iblogger.org/28648906043.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/hj2TelE/66913818323.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/sgil8ie/baby_back_ribs_on_grilled_recipe.pdfIn PDF document text
    • https://rovupugefo.weebly.com/uploads/1/3/4/3/134359584/9786db04ae45c.pdfIn PDF document text
    • https://kukusekiwija.weebly.com/uploads/1/3/5/3/135389364/4fecd.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/giancoli_physics_for_scientists_and_engineers_4th_edition_free.pdfIn PDF document text
    • http://fofakowusagafo.22web.org/what_is_the_proeutectoid_phase_in_a_1095_steel.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/nTjOVVA/28669275751.pdfIn PDF document text
    • https://cdn.sqhk.co/zapevexuvot/1gjjhYC/77016848719.pdfIn PDF document text
    • https://buwapagav.weebly.com/uploads/1/3/1/3/131383965/zagejixunus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sekijipaladi.epizy.com/48433576009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44dd8589-5bb5-4c50-ad67-f6ba2763f10c/financial_peace_jr_age.pdfIn PDF document text
    • http://dakisexojir.rf.gd/haloalkanes_and_haloarenes_class_12_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851ba2ce-6e69-4a0c-9f2f-c57e8136f33b/which_palm_is_read_for_ladies.pdfIn PDF document text
    • http://tuxesoguzegisox.epizy.com/farorozodotasumavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4284592-6c36-4cb5-96e7-e8aff2170f53/97832613919.pdfIn PDF document text
    • http://jozixal.epizy.com/ohms_law_circuit_problems_with_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27de6e9-e4b7-4727-a401-4dc3c3f0d821/fuvepusivokon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE654 5272 bytes
SHA-256: 73bad12d8a14ce52df4df3a014fe50ba6acf382d196274b4a85c113cdd93c9d3
font_01_sfnt_off0000f7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F0 11144 bytes
SHA-256: bdf2296ebeece3da3b3192bf832c800d303192fd2c8b972a5a7b8836dc87f245
font_02_sfnt_off00011c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C76 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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