Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1750bc2efec752…

MALICIOUS

PDF

71.3 KB Created: 2021-03-17 00:31:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 33514568ababc872a622b367f90c7da8 SHA-1: 5582c3aeae1b7e095fc05842141b5fd9a89d4d5a SHA-256: fb1750bc2efec752944c0afe10249c0bfcc1aa1cfa767b7feda2f18d24d565a6
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It contains numerous external URLs, with at least one, 'https://botokaw.ru/wix?keyword=bemis+h12+300+humidifier+manual', being directly embedded. The PDF's structure and the presence of multiple disposable hosting links suggest a link farm designed to redirect users to malicious content. No scripts were extracted, but the PDF's nature points towards an attempt to trick users into visiting compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=bemis+h12+300+humidifier+manual PDF link annotation
    • https://basalolevezuw.weebly.com/uploads/1/3/1/6/131606508/7686624.pdfIn PDF document text
    • https://nipixosawapur.weebly.com/uploads/1/3/1/1/131164079/dozukirarez.pdfIn PDF document text
    • http://rozisokotedowo.22web.org/45217664951.pdfIn PDF document text
    • http://gemitufelog.22web.org/34323902574.pdfIn PDF document text
    • http://in-arenas.com/caliber_scientific_calculator_instructions_manual067ab.pdfIn PDF document text
    • https://cdn.sqhk.co/zodenizekija/IjcHlSN/richardxpress_s._a_property_management.pdfIn PDF document text
    • http://slampochka.ru/trimble_s6_robotic_total_station_manualnjfwa.pdfIn PDF document text
    • https://volinamonapefez.weebly.com/uploads/1/3/4/4/134494747/kuvogofenowe.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/AukQib5/faninapolaf.pdfIn PDF document text
    • https://vonufire.weebly.com/uploads/1/3/4/5/134596457/367242.pdfIn PDF document text
    • http://gavojutopubiri.getenjoyment.net/75581275761.pdfIn PDF document text
    • http://bestita.space/autodesk_maya_shortcut_keyskhpum.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/8d1eb4e9-4c47-4134-a9dc-512cdac8588e/72566418748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ba7a92f-d414-422f-afdc-1aedbf778e45/lebumorabemeruxesujelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4076bbef-5433-4b5a-8d51-1f3f6b09894a/how_do_different_sugars_affect_yeast_fermentation.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/star_wars_books_after_return_of_the_jedi.pdfIn PDF document text
    • http://surafupomef.epizy.com/60400187287.pdfIn PDF document text
    • http://vowurereluvox.epizy.com/49063367832.pdfIn PDF document text
    • http://tijejawoporufil.epizy.com/71846104796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e40e28-5887-416b-93eb-2a6ea3d9e84d/64353449803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/000bf9e9-156a-44ab-97cc-8a0d1898ba96/wexufusuwoligotepagode.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/lobegobudasokip.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_off0000d39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39A 5688 bytes
SHA-256: 82f61fd460639a90c2186d8a4e56d14bfa95c2eb89ac2fd73fbf7a225b0ef2d7
font_01_sfnt_off0000e6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 11756 bytes
SHA-256: b4e955a99590f27d81e3faeafda714238f8f608e4fe2fdde0901e5404fd20e66

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