Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb307d0c480fbeab…

MALICIOUS

PDF

83.1 KB Created: 2021-05-15 14:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6a68327a515be96b200c380d71d420ad SHA-1: 7c115f668ae5045c851998b806b0a39a55c3a10e SHA-256: eb307d0c480fbeab5f81473be4dae23b0efd81a14ce5ec81648530c86ca868e8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary suspicious URL being https://bologen.ru/strik?utm_term=how+to+charge+motorola+walkie-talkie, which is likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain keywords related to the suspicious URL, suggesting a lure to trick users into clicking the link.

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://bologen.ru/strik?utm_term=how+to+charge+motorola+walkie-talkie PDF link annotation
    • http://folejaf.mypressonline.com/social_constructionism_and_symbolic_interactionism.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/ludimudagaginenub.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/business_vocabulary_in_use_intermediate.pdfIn PDF document text
    • http://kevebofuru.medianewsonline.com/90154132229.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/how_to_put_a_needle_on_a_spore_syringe.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/8414bf6e-2e98-4899-9196-a896df72caee/17578645370.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/weber_genesis_ii_e-310_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/46227589661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f36da8-8943-4d0d-90f5-46ce0fca128f/dimipasan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e64d95-cc11-40fd-8a4c-c3644306bc31/river_road_recipes_iii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48a47788-dd65-458a-b3b9-00ffd79fa0a0/how_to_subscribe_on_twitch_with_prime_on_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/9968517608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/877721f4-c107-4d84-a23d-27608988bd26/74976859931.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/guess_movie_name_puzzle_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/nilexegirosavetekimaboji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5446d7be-0823-4d9b-be34-190c6dd4ac34/59339891880.pdfIn PDF document text
    • http://rexefobixavater.myartsonline.com/what_is_the_best_drawing_app_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/bottom_navigation_bar_android_height.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/vusewa.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/67150866382.pdfIn PDF document text
    • http://wozitoso.atwebpages.com/vuvuveju.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_off00010980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10980 5184 bytes
SHA-256: b96703bf8fa4743babcf0cdf2c48fb9dc52a444b690de6f53bf082735bfa60a4
font_01_sfnt_off00011b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B12 10408 bytes
SHA-256: d06692ff387befc1c5465f5be8955ddfc9ea72975fd423f5e02b5f9505567349

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