Malicious PDF — malware analysis report

Static analysis result for SHA-256 9617f8ab9d272028…

MALICIOUS

PDF

72.9 KB Created: 2021-06-07 11:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d43769613ab214992a90e2cbd26b1c7e SHA-1: e3c18f7928f35e3044b4455b7d3ef8b7a3ac8a97 SHA-256: 9617f8ab9d272028d47f16731ee8596b6d8df022f584f3b70bec9b284816b2f6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cructi.ru/pbw?utm_term=what+does+the+color+black+represent+in+the+bible PDF link annotation
    • https://xebolusuzibukun.weebly.com/uploads/1/3/4/5/134506512/febukivezedas-livoke.pdfIn PDF document text
    • https://kepuwizetel.weebly.com/uploads/1/3/5/3/135304134/dekuve_sugasonadaxixa_gupefutewe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mosijiv.pbworks.com/w/file/fetch/144750003/konebeve.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/w/file/fetch/144435813/top_5_best_live_wallpapers_for_android.pdfIn PDF document text
    • http://sokulus.pbworks.com/f/36890971404.pdfIn PDF document text
    • http://natofuke.pbworks.com/f/3485126765.pdfIn PDF document text
    • http://jajafad.pbworks.com/f/wilowakasadur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dbeb5fa-fc28-4228-8054-97fad6a8e742/xijapozujudawuwilosorig.pdfIn PDF document text
    • http://molitutolu.pbworks.com/f/polk_magnifi_mini_5.1_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97847dc9-1ddf-44e5-bcc7-733271136a14/cyberpunk_2013_box_set.pdfIn PDF document text
    • http://kutegazez.pbworks.com/f/63128914421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275a8a99-a1f8-4716-b881-cff263a319d5/watinenagoxopodoworiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f72ba7-4e1f-4d58-8d5f-8864fd9603a0/road_to_hana_map_stops.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3b36e9-e470-4e3d-b283-a10b33fc7168/vizio_e370vl_remote_code.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/schumacher_se-4022_manual_wheeled_battery_charger__tester.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40b3d73-a97b-4921-bc9e-6d5b8f0dbbaf/chemical_bonding_practice_test_answers.pdfIn PDF document text
    • http://jilawuxifi.pbworks.com/f/2104834190.pdfIn PDF document text
    • http://jebusolole.pbworks.com/f/22697706692.pdfIn PDF document text
    • http://ridelox.pbworks.com/w/file/fetch/144742083/fuwetafezufuvusiru.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_off0000df3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3A 5380 bytes
SHA-256: 14984923544bcbe265ec4a0f0950435a95f7a0fcb65d5d467954330971ea4960
font_01_sfnt_off0000f184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF184 10848 bytes
SHA-256: 1f647d53f252adc54eceac2394e7b080a86c2eab97b1f92db85685ffb8a47392

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