Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff3000bf88bf255…

MALICIOUS

PDF

101.1 KB Created: 2021-08-05 07:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a370c0ba508f092fbd4209923e41fc1c SHA-1: af133ecd95836255a76d7f418b044fb8c6b17fbf SHA-256: 0ff3000bf88bf25532c24d60e44be2ef0169904cfe907486b421f822a49739f3
164 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload storage and disposable hosting sites, suggesting a phishing or malware distribution scheme. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cructi.ru/uplcv?utm_term=hadees+qudsi+urdu+pdf+download PDF link annotation
    • https://press-centr.com/images/file/wikufibete.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/rumolijilatilo.pdfIn PDF document text
    • http://buildinggodskingdom.com/webcms/file/74539568654.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/poreriditokizoni.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/96321093667.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8af55cdc5b---41193805708.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/viwomopatiwasudewuzevo.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711b84c82f5---39540190535.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/xozotu.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/bajepowuridukiset.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/xejexotigofakun.pdfIn PDF document text
    • http://swiss-ex.com/7759811708.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c5177071d0e---mozudotuve.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fca6a0e9e39---lokinitolifizame.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/watowugogipuneviguzot.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b446ca5f194---21238441987.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/pigibo.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/e9d3270ded9d551a13fb07fed40f5086/xitisuweteviguxoj.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c945d59ff2---pulonere.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/6d2rfs11k7alktemt9gjiirlj0/wewumidaditigevolebimexen.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607361a8b5321---fumodenerezesakamobolovin.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/0817850b7d6d8ab763f5ca0d7b4de685/52747512586.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/dh4dq2ivhrfgsoham3a91opemc/46188362392.pdfIn PDF document text
    • http://polish-house.com/uploades/fckeditorfile/58381762989.pdfIn PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/6392566478.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/965951981.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f51c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF51C 22252 bytes
SHA-256: 9ad766643df1072a23cd9148b79402b908d84a9e9987cfa2aa4e21376fec2a9a
font_01_sfnt_off00011c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C94 20940 bytes
SHA-256: 4530d037c8bb68b5cfc475d2364081490ea30ee27f54fc0b13b8aa5c92456d14
font_02_sfnt_off0001539a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1539A 10716 bytes
SHA-256: 929eb5b9b24e0ffff83db271f8990d0f0adbfecd0f2c2798c456492e692a01f3
font_03_sfnt_off00016c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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