Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6e1c7fc13a8e9d…

MALICIOUS

PDF

84.9 KB Created: 2021-09-07 09:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dee918be77eb1ac3affe050d1e290980 SHA-1: 713a06ae3a87769c7bd77a302fdcc7cbb0910c8e SHA-256: 8b6e1c7fc13a8e9df853c391174665c03ec195f7f2dc2defcf0aa255bbe0c8e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting domains. These links are likely intended to lure users into phishing scams or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=soulless+jim+derogatis+pdf PDF link annotation
    • https://arbormaster.net/uploads/files/53929560846.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609484157c856---kepiziserewigodajivamajiv.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160fa698d81920---2510867515.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/a45b285fdd391ea9bd8c7722c522c5d8/46413652908.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/df9f5f92e551306116814f9ded63732a/lijorubosigegufised.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/dbce665f33d55f1695984b87f8c3cee3/75859896790.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/rikezode.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/69651087.pdfIn PDF document text
    • http://viorina-deko.com/images/file/dewez.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/jinaletadevuda.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4207c258b---zoseleturubor.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c44966c5a47---xokebekugatasamabi.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/k8qef36or8opl9p4veedoiv5h2/6260576673.pdfIn PDF document text
    • https://baptistfriends.org/media/73173038711.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d481af335---59745561019.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099319d98952---xowikiwunezenovanorikutem.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79550358391.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a476220b7e7---dowoxoguv.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/57883e62f36ccf0438b7e888bbcebd2b/72028667850.pdfIn PDF document text
    • https://humicdp.com/uploads/2021-08-13/images/files/53970581659.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/majevebevexaj.pdfIn PDF document text
    • http://richfieldhighschool1969.com/clients/868116/File/zazag.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/putamijipixe.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/428b9d47789d1dfce53158df96b846ae/xofamoras.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_off0000e5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A9 11044 bytes
SHA-256: 2eca0f9c2d075f23330bcda33a64b041b7973512dc68b7957fb0a2191ce04540
font_01_sfnt_off0000ff1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1B 17964 bytes
SHA-256: 88d18ff127e2674fa2025e8e4080b0dc7ef2b4262d149bc6673385f0dbc10baa
font_02_sfnt_off00012d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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