Malicious PDF — malware analysis report

Static analysis result for SHA-256 65590a322a2ece03…

MALICIOUS

PDF

82.3 KB Created: 2021-08-22 03:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7e4bdac5aab3b7e104eaf4a725579f27 SHA-1: 95d2be888c191daae403a324af69e6a1c4d4ae3f SHA-256: 65590a322a2ece03df59dd882267722148d757bfe042439e39a8a2961cbb1075
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading more harmful files or divulging sensitive information. No scripts were extracted from this sample, but the presence of multiple compromised CMS upload links suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://allytemp.ru/uplcv?utm_term=moana+songs+mp3+free+download+320kbps PDF link annotation
    • https://zivotzaokny.eu/res/file/zazuronijej.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/nefipugezibolibab.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ce7e5cbda---25159565624.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/2254857850.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befa80908c4---55152479371.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/bevbnkufkl1m8tsn4grgg0ibg5/tufapakejajunadikakafutak.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5733edc08e---56106974552.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ee63e5ac7---dibaxipolalububen.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/pituziripugibufiledo.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/46546944203.pdfIn PDF document text
    • http://lesmashclub.com/imgUpload/files/86035375471.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/pukepipuligidopifo.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/netep.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/d9c16qel4vva4pm7pb7lhl5oeh/gixedowes.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/gabozalo.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/d7ko1bcp3gp18t4ofvomqvd3pj/75158788804.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/7212a03909670360710e15d812b54fb2/jojonezelubuga.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/letowekixujinogifax.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/38443958422.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160713c74a5a8a---losogozijigeraradinogugi.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/vekolijopixaw.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/78183002830.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/gixopobakemunapu.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/8597261754.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_off0000dbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EA 11376 bytes
SHA-256: 517829d2fde6e68c28d9673b3239bb9d90b12114e20f36e847ddc2c424687e87
font_02_sfnt_off00010e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E68 16924 bytes
SHA-256: 8b8d4b1c402ead65f2ca5e2c4e253c69bb62d395efdddd2edf451f6162fd9733

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