Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8ed2aa9b5ea4ec…

MALICIOUS

PDF

84.6 KB Created: 2021-09-13 02:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8973f7b82fe31a5f2a299957a0c3235b SHA-1: e1b624cd3c4a461def7234d73ac82b7161180954 SHA-256: 8e8ed2aa9b5ea4ec958677633d5e54e24fd0d415c33c78cc1a352cb1802c43d7
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains, likely intended to lure users to malicious content or phishing pages. The presence of these links and the overall structure suggest an attempt to exploit users through deceptive means, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alicantea.centralcms.cloud/galeria/files/lisixusejawosexexaxakebil.pdf In PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ceff23698f---lilow.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b382e0ab84---sawuxoxuleni.pdfIn PDF document text
    • https://grouptm2.com/contents/files/maxerezolegakotapifefivax.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/87526983377.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/37724608902.pdfIn PDF document text
    • https://htchninc.com/d/files/55828000835.pdfIn PDF document text
    • http://asid.rw/userfiles/file/mebutuvorakafonisiwazul.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dbe33756a5---84779657841.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/68855940537.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/naxobamefoborado.pdfIn PDF document text
    • http://mamam.by/upload/File/file/mebekanewimukoxomaruwewo.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/0d20cdccb71e3ef97c0d61428c12f60e/11182084192.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/xadaragolati.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/bajijoranabubaz.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0691376001631023699.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613e21ad9b07e---17210941482.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/wiloravopamuwaxikude.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/25258971343.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/99403558621.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130b284856f3---zemavefulabag.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/mesabukefadafewi.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/70995662994.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/8c776904e02d0971be994c6629974746/33732179570.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/tubopa.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131afba25607---68864484479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=gunship+strike+gamePDF 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_off0000dc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC69 21196 bytes
SHA-256: 400f15cd6ea62ed41000c419fefe9055573bb1fd58e66eff18869e3ba0288e2e
font_01_sfnt_off000113d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEF 10764 bytes
SHA-256: 00066087253671142e3aca74947e13660956245a7bb82935972f2801880b41b8

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