Malicious PDF — malware analysis report

Static analysis result for SHA-256 062fd76af48eb04c…

MALICIOUS

PDF

77.9 KB Created: 2021-08-13 06:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: eae00be89775216980f94c81d9467403 SHA-1: cfe8acd5a8b3dd9d674fca07e3ea682bbb089b5d SHA-256: 062fd76af48eb04c748008fd5130c6587c2888e98253d48d93d33c01d834b61f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS upload directories, suggest a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160dae585aa0c7---dirokenukokeful.pdf In PDF document text
    • https://dnmpaint.com/sdcc/images/file/81376923793.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/mnctermqcjbt93u43udohtv8e4/xusonijofunukusulapimobut.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/u97sdo2nrncl3utcrgp4ptviob/fikefapagifir.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/37d2746206630349135d67da57acccd7/dotugewizudotowig.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/1607712173.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/34429749987.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/93716466765.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/zowifulabakudebaziduf.pdfIn PDF document text
    • http://rts-3.ru/upload/files/gatamupefepep.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dc305e39df3---44943979697.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c96090d033---tetewupugezux.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160867b9caaea0---wigilup.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be152551121---kekezedu.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/30799960363.pdfIn PDF document text
    • https://people11people.gr/uploads/File/dekirewojaxobid.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/sarezig.pdfIn PDF document text
    • http://satbietthu.com/luutru/files/39809672352.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607acff239920---pejajoto.pdfIn PDF document text
    • https://cebrigantina.com/025-CEB/images-editor/file/wowawosipinazeted.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/32662560862.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/23763309224.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/80929718236.pdfIn PDF document text
    • http://dakmet.pl/upload/42971027330.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///vesajupeboluji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=7+kadal+sangili+karuppan+song+download+mp3PDF link annotation
    • 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_off0000cd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE560 10908 bytes
SHA-256: 5a297eb8a321073e2820fb9e716b23167c72b9401651229d2d80697b3eadafad
font_02_sfnt_off0000fe69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE69 16644 bytes
SHA-256: f14580c250af997c04b3dd345ea5e18ac825a8f2005824021c5ef6574d4f489d