Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b709d41bbddc43…

MALICIOUS

PDF

87.7 KB Created: 2021-06-27 13:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5b9535b64f27f65b01e22de3c735dd56 SHA-1: 1b5f86cbd9cc654df4b816b75966858a911352b5 SHA-256: 08b709d41bbddc43d8a62de1723811398f4f160fe02d622f6892c313fc515a39
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the nature of the embedded links suggests the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078cf4bcfe98---28029524337.pdf In PDF document text
    • http://aldo-ins.com/userfiles/file/63988329627.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/15983157605.pdfIn PDF document text
    • http://indel.sk/userfiles/file/mimenuxi.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/42309092658.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/wukagagipufo.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/02ecb1627f785057a79254248c0d90f6/delarabexifitisifikifowar.pdfIn PDF document text
    • http://yuha.be/_files/file/jefolamovugevokokimub.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/gatiwebamuzozubigijuji.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/9904818056.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/9631481655.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/dc99a29893c02aa8fbee854e04ff4773/18359208549.pdfIn PDF document text
    • http://vce34.ru/attachments/file/63245941761.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/vejomevepedebaxifelu.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160761c35db694---vovurozutofenav.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a660233c419---21049623787.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160710e02ef42c---xefixugux.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608521bb9f20d---gepajupexog.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8a8d07d54---xiporupurikunizitepomi.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a7750f81b---magonijutexekawomomipanuz.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/67985589422.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/b0701f811da32ab08d6e539a13e25679/11064458238.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/nalogamefesajebul.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/3272cd7a33774ab69453aec73e4ce3ad/49631030636.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=princess+and+the+frog+watch+free+onlinePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 18364 bytes
SHA-256: 8ed14ed649d3c8792b52493a679bcd7c18575427aa64a1db25b7271d66208a75
font_01_sfnt_off000120a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A4 10844 bytes
SHA-256: c4b84398f23f92120f6125e631509e95a41b0267e4a51e0bca1fca804b972905
font_02_sfnt_off00013974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13974 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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