Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00feec1110ebb50…

MALICIOUS

PDF

86.9 KB Created: 2021-09-23 00:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eeda395701bdbdd32b2a2b0d865390e0 SHA-1: aa33ba16892734d3223cd4d96169016199e63eba SHA-256: b00feec1110ebb50e77019e616e4621a042bc23eff1e220998fea55a1185f94f
196 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 numerous links, many pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and random URL links points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://pixomot.ru/uplcv?utm_term=stream+teams+to+chromecast
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/48ad3af846809926de1da2a3d45e4c3d/11052161084.pdf
    • http://ksklinika.ru/ckfinder/userfiles/files/xevodu.pdf
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/gokebexewut.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161309959c84f9---81703085832.pdf
    • https://doctmcooper.com/userfiles/files/69016839037.pdf
    • https://teamcode.net/upload/files/1592749086.pdf
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/77420860874.pdf
    • https://cplastik.eu/data/cms/file/zadafibofuxodebifa.pdf
    • http://bobiniauto.com/userfiles/file/62430994364.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/4fb87115fa6931b930ba66254018c64b/pasexizo.pdf
    • http://stickerbarcode.com/file_media/file_image/file/vanip.pdf
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/pajefaluzibekalanovavipud.pdf
    • https://aletihad-group.com/userfiles/files/nikujezenofuxonaxizilod.pdf
    • https://immsac.pe/sgi_userfiles/userfiles/files/11197627194.pdf
    • http://makesomenoise.hu/upload/file/59686234607.pdf
    • http://ks-system.co.uk/ckfinder/userfiles/files/wepologopupunu.pdf
    • https://jimsdelibrookhaven.com/demo/jimsdeli/admin/userfilesfile/98318630792.pdf
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/sanurigo.pdf
    • http://thebrownbag.vn/upload/files/44736731816.pdf
    • http://costruzionibulagna.it/userfiles/files/vetagitutiti.pdf
    • http://rovitek.com/userfiles/file/3969111473.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380cc9e2de7---lonogiwaseba.pdf
    • https://internationallanguagenavigators.com/media/23569749477.pdf
    • https://equantumconsulting.com/files/files/25797642183.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/8e9dd177bcf1dd3c80495572d8a99d3e/kilatagunebiji.pdf
    • https://smartbrand.ro/mm/file/peminekanixiwujavobin.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCE 16792 bytes
font_01_sfnt_off000107e0.bin
a68e5a29ae54a875d4ec2c9f4938122c1346ea71a72f69b801d6452ae4593775
pdf-font-stream PDF embedded font (sfnt) at offset 0x107E0 17884 bytes
font_02_sfnt_off00013653.bin
62d530b5c8a9739dce5352a5d818abb40c893fbde65944512ec75afb1a27b5e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13653 10328 bytes