Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc5ae7679744ae5…

MALICIOUS

PDF

94.3 KB Created: 2021-07-15 10:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 617f5b12aef1c58aa9a17c71d2ad7f3e SHA-1: 4a8d6a85e78f5532ca0f92c3eb37a12696831cef SHA-256: 1cc5ae7679744ae5252d4060519938f18d58e603f3d5edef14d32d6020cfa909
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute further malicious content or phish users. While no scripts were directly extracted, the presence of numerous external links on compromised domains indicates a distribution or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://vodnik48.ru/content/file/tesewag.pdf
    • http://dsraxys.com/uploads/kowisikerufafej.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db8ad3e0e73---39933429166.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f486f53507---davux.pdf
    • https://hophamthaibinh.com/upload/files/45146200786.pdf
    • https://kuni.ro/app/webroot/files/userfiles/files/28628107120.pdf
    • https://artasedanasingaraja.com/uploadfck/file/99993730864.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e77b1041faf---xoferedinusesusagasewuz.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8110a84e9c---sufasobuzawebogejafus.pdf
    • http://www.prctech-th.com/ckfinder/userfiles/files/mapegewedovoxawuw.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27b1c13c51---ledijada.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf900cc62d9---nulugelabev.pdf
    • http://trimblehighalumni.com/clients/84492/File/moguseme.pdf
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/kilegiwixu.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606d97ef832e1---tokerel.pdf
    • https://bauarch.bg/files/70052644092.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9b8fc9541---mujonubedelemifadujox.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/ti33m628l51v0qsn0msaogrp36/92567387226.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a737898f381---4774688495.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/d94280cf66b62034db849ec1199c6aea/linofekizuzibawenesoxod.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/koborupere.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/09419d91b744f471eb79ed4003c4487a/lekolokixesovajevo.pdf
    • https://hanahana.vn/media/ftp/file/27316527651.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/n3j530dcoi43726gie8djtl466/sipibuto.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=8+ball+pool+legendary+cues+mod+apk+download+2018
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec16.bin
f6f90882c41d7bada05659ae46eee08499c7958e7906b68d95350870fbd553e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC16 16364 bytes
font_01_sfnt_off00010230.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10230 16792 bytes
font_02_sfnt_off00011a47.bin
79bb9c7a493a80e9fb7cb10fd688f789b70c124dcd93a6683ffa3b62075cc113		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A47 11604 bytes
font_03_sfnt_off0001358d.bin
b8d5e7918a43369d35fff694a755532c5674739549b74c4903d61f4013252d5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1358D 20104 bytes

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