Malicious PDF — malware analysis report

Static analysis result for SHA-256 589a02da208b937b…

MALICIOUS

PDF

83.4 KB Created: 2021-09-04 19:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eb3794cefe680ed72accedc4caa45ac2 SHA-1: 51ec99e4532ae0e874890183d6d89b5d6791d13e SHA-256: 589a02da208b937b1e48b60095dfae576a890568eadb3b99028291aa44fdffd0
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=vermeer+625+chipper+manual PDF link annotation
    • http://gt-outillages.fr/ressource/site-image/files/xiruza.pdfIn PDF document text
    • http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/57330982381.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/92856373254.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/dipusudobajokuta.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cd84e0893---lufiwadidofejorebirek.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/15750663010.pdfIn PDF document text
    • http://congtyvima.com/images/Download/39855831408.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb8ed9710e---29502676869.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/vakarexij.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec537a4bab0---49903094421.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/32438127313.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/xuneturatasidewixemuw.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/2rmuaedq0jp4dctpqoe3hl8h11/vafoxebagaketuxu.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add260da9d1---keximanovuxozat.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/vonudosanigiselore.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607978402f603---60270529093.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad957ba19dd---59848397179.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/jerado.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/sezepuke.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/16949246629.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/vofixarilufuzaguvekojum.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/wolusavutepewigon.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_off0000ddbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBF 10744 bytes
SHA-256: f5a856521a281adc46a1b0bb87dd002ff74ca68f5cb8dd3ddde83a13b294070f
font_01_sfnt_off0000f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 18444 bytes
SHA-256: 84673122a3a3bc306b95831c87c77a68107645ddbbc99d2e9627fe5305f7055d
font_02_sfnt_off00012661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12661 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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