Malicious PDF — malware analysis report

Static analysis result for SHA-256 562abe944b207ce7…

MALICIOUS

PDF

69.3 KB Created: 2021-09-09 11:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3046f0c261990f7fc5c040fc83d32768 SHA-1: c0a941dc849aec861bc5abd5f76f8f7cd2fae484 SHA-256: 562abe944b207ce7231ed6577dd048523ee9295bbbdce7a418a8df435d7dc02b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The PDF structure and embedded URLs indicate it's likely a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://philabc.ru/uplcv?utm_term=teams+on+android+tablet PDF link annotation
    • http://studiofranzoni.eu/userfiles/files/vagixosawusujozewefunu.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/48778796353.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210909055003.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/2300292484.pdfIn PDF document text
    • http://ergakiland.ru/files/files/gomexonuviluw.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/56072924754.pdfIn PDF document text
    • http://guerrazzi.info/userfiles/files/66102248170.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/38638977784.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613511b61e649---96215181534.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/zefutobedogoparuje.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/noletogojarobi.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/duzebupimusavuv.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zuzewuzazujotijogere.pdfIn PDF document text
    • http://gloteckr.com/upload/editor/file/31157887273.pdfIn PDF document text
    • http://15441707.com/data/board/file/20210905223412.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/muxuleno.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16131f9222ed29---tisujafuku.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/sigokupuled.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/8686682268.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16131093410787---73430586144.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/vitopom.pdfIn PDF document text
    • http://vititanon.com/user_img/files/vudomitupaxufafaxetob.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_off0000b0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FF 15168 bytes
SHA-256: 350f1c246830f845aee0c7b4f5eb2b2f61402f865988af674673d97ab66f52b6
font_01_sfnt_off0000d769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD769 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 10512 bytes
SHA-256: bc93a3b6bdadcc9ea35a660db4cfe0105954726a6bc8203e45b3ea2d6895b471

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