Malicious PDF — malware analysis report

Static analysis result for SHA-256 0174a079cd35b2e2…

MALICIOUS

PDF

86.5 KB Created: 2021-08-10 03:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 59bacbac047cc887e9580d2feadbf176 SHA-1: 5c6bb2b668b1e50dd0e5d732abf6cfadbba0b17e SHA-256: 0174a079cd35b2e2b87de5d6105210d96daaa0ba02dbea8c1e62038528376976
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely serves as a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, designed to redirect users to potentially harmful content. The presence of external URIs and link farm heuristics strongly suggests an attempt to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://inwebjor.ru/uplcv?utm_term=minecraft+mods+pets PDF link annotation
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/lerilokedofule.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160af969f96995---81522439567.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/d3atlh5ml2kmdpdrte6tmc9i76/bimowibazijoxinek.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/0d7961f656962b64805aba32ff2c1afa/wezoj.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/56bc3f18ab06693e87dc911b2e961817/36118657508.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210523134917_8b7ki8.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16070beca07a2d---duwezo.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/17954278045.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5675d64ba---33063238515.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021072708050173.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/91585363868.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/5a26232bc6ecfa84d0fd26fc9550713e/vivepomevuvepafuzefidunok.pdfIn PDF document text
    • https://activepymes.com/pub/file/62638389176.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/02qnod1av2me2j75qivic14l07/15846954846.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/6386840226.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/60fd25cba6ce6.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/d41264be4da7e18122581e63fa47610f/fobarebipilegemivar.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/tovezutujulivedozitenelo.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/81428127630.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/21473966980.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/74353894763.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160dc018662c11---susepixanawunorotole.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://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_off0000edf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10606 17220 bytes
SHA-256: 05d1cb3f1ec9fe1428b3bdaafca6ce58be5756903b9ec3e7b1094443ce1d45ab
font_02_sfnt_off00013332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13332 10728 bytes
SHA-256: 6fefdc0063962ef1f02e690c51d90ff9dfe8b513bf7421cfec0a26cf4c2625a8

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