Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d7f6ae2b52e61d7…

MALICIOUS

PDF

75.5 KB Created: 2021-03-23 12:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: db6e4b2e7dd5f73bf779e949ffa155ad SHA-1: d11755c52c7c877a9a4ffb1a833fef0684b213fb SHA-256: 4d7f6ae2b52e61d72f9e295c9fd67b1da5585db01b67a0844b8077e667e1a911
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple external URIs, with one pointing to a suspicious domain ('druttle.ru') that is likely part of a phishing or malware distribution scheme. The PDF's structure and embedded links suggest it is designed to redirect users to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=arbol+de+toma+de+decisiones+pdf PDF link annotation
    • https://nugenezeni.weebly.com/uploads/1/3/4/6/134632238/f0d890487b2.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/wasajubikunaxo_vomomag.pdfIn PDF document text
    • https://kukibutojiw.weebly.com/uploads/1/3/0/7/130775835/govirifugoz.pdfIn PDF document text
    • https://serirufudo.weebly.com/uploads/1/3/4/7/134712976/7ed12fa7f72c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_4c86feb248bf4c7fa4b0efd455395a38.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/pebozovujegalilisas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa50a29e-8d19-4b1b-8538-464ebbfa4750/little_house_on_the_prairie_season_1_episode_19_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/deromiribemexojixeba.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/senorita_video_mp4_shawn_mendes.pdfIn PDF document text
    • https://5e446c31-fcb6-4427-a178-91ee45bbff8b.filesusr.com/ugd/4e76b8_82fe42014bb0436e913fca98e51f23c3.pdf?index=trueIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_02349b0df5834ac78ad9ae04580eb66e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec1af639-19a9-4d1e-b96f-69c35a81a8b0/riwiwedilunu.pdfIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_63860b4e3bf641ea9fba9c77cbb05d40.pdf?index=trueIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_fca9731170674388af0ef58c3194b52b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sisaxu/75462289886.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_off0000e660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE660 5432 bytes
SHA-256: 037a482f67a21d53ff1069c5c879cae3c809ad6b6ebbddabe0134b990185388b
font_01_sfnt_off0000f8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B6 12032 bytes
SHA-256: 261c490062a75f101f3d8d01ab13747a89b22354a02fbd6389bd3e9bc6649d2d

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