Malicious PDF — malware analysis report

Static analysis result for SHA-256 d460c17ee72e4e64…

MALICIOUS

PDF

69.8 KB Created: 2021-09-24 14:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f159b6410205bbae3c12f6bcb23d0689 SHA-1: 3bd5b622154f9d8546a7820ad1f2362552d6b03c SHA-256: d460c17ee72e4e644b74c07c6ce4fe3c6cc55227357ad5364593ef667bfa76a8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URLs, many hosted on compromised or disposable domains, suggesting it functions as a lure for phishing or to download further malicious content. The presence of a QR code lure heuristic further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=android+traffic+analyzer PDF link annotation
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b033eea49b---bosuginolubegunit.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161494b0fc30af---zudofala.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/a97bced9250d36115190ec4de3438e82/lodolujunepup.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/45486077056.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/33743908318.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/rutaduzixu.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/36348228546.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b701445f0---gidipife.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/fomedosalitivi.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133adffa4882---boratesipuxemetef.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/zuwurevajin.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/gojibuvabu.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/3321836219.pdfIn PDF document text
    • http://fairfresh.net/assets/admin/ckeditorimage/files/41886516347.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/6732172368.pdfIn PDF document text
    • https://thehouseproduction.net/file/31576466627.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/bisifeluburusafokub.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/lutazowasagomorap.pdfIn PDF document text
    • http://kechengchem.com/upload/files/70020533665.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/kevemarugitowewatozunepur.pdfIn PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/9543936759.pdfIn PDF document text
    • https://krzczonowice.pl/gfx/file/47278794657.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/gbjovq58td6fsafniivserrjcv/92997731157.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/wedefodexurikizobap.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/93887250223.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_off0000b321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB321 10456 bytes
SHA-256: 5f98f91b41322755703370a559c60cd095e7f3d9a054048cf77cfc915e4cc828
font_01_sfnt_off0000cb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31E 15340 bytes
SHA-256: 297ec5eb40f91c2be4425ffa40a96620dda752039967941dba019758c7984496

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