Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a7269e34df3014…

MALICIOUS

PDF

148.9 KB Created: 2021-08-16 04:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1baf05090782008fa29d7fbeaa052608 SHA-1: 91746668c9a01fb273bc81422fa7741c9b847e82 SHA-256: c0a7269e34df3014f885f34e971478532c94333884218014f1d54e1d27c1773b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple compromised hosting links suggests an attempt to distribute malware or phishing content.

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://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823fe4a20db---53575044772.pdf In PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742796ee2fa---69827649951.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/lowajobavatekotusoke.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/5c10b9d7215d2d0c054fdc31e0b18e42/46321774031.pdfIn PDF document text
    • http://canadianrockies.info/files/file/41083078072.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/3238557265.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/0418cea61a650192fd03b75672190743/16400074288.pdfIn PDF document text
    • http://noithatachau.vn/webroot/img/files/34997500729.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/48586211047.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc8408a77e---43107431871.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/88029156589.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/483ff65bdf1898078863fccc0b7d00de/56657121336.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/jafipule.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/29020448303.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/romufod.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/fmdq5krjfch57ahcjrcpc08jd2/xapenarizaxazusesofaris.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd63f31f8d3---lorivewiwaxejelanofeke.pdfIn PDF document text
    • https://artbynela.com/uploads/file/41662813633.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/86787012089.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bbce99497cc---dutiber.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c104ec822b3---zugubimuremesifera.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160728d57047f8---2924973464.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/wipokipusumujifusobajaja.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021072415172173499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=irony+as+a+principle+of+structurePDF 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_off0001e555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E555 17944 bytes
SHA-256: 9ed83431e14c443689bf93f72fda08e1291deada0777434b792faaa4ec648b5a
font_01_sfnt_off00021418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21418 10636 bytes
SHA-256: db8954c6ff9601afdc82b1652ba80937d16276f756f978a7e87634993fc20543
font_02_sfnt_off00022c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22C9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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