Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da36cf992b83f98…

MALICIOUS

PDF

101.4 KB Created: 2021-07-30 10:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9d9ef3c7989bfa1890fb027be2d37c28 SHA-1: d5b93a4252f31672058ffcbc161e7d906abc614e SHA-256: 2da36cf992b83f9875eecf6c9b067580ed5e4344df8ab5865b2ed021a48e425b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised websites or disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites for further exploitation or credential harvesting. No scripts were extracted, but the structure and URL patterns are indicative of a link-farming phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 http://ginzaoakland.com/uploads/files/93553284523.pdf In PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607333e492e01---61721883581.pdfIn PDF document text
    • http://gptools.net/userfiles/file/faselebas.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/10731795715.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/471dc0dbd512ee0e1a5a88dc5482eb40/fofebalodilaxudibepozut.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/9424270820.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/kumep.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/98172466826.pdfIn PDF document text
    • http://xpressup.com/userfiles/file/14713561543.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cadd9ca4a4f---21864201261.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/rjiutjnqmj1ea9lv9lte8mqft3/difikolusuvu.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16099082c562f4---51201768582.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/genetepape.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/463198470e52378e5f2e0951d2f6245b/65671844827.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-6-22/20210622200319123997.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/t1rahl4vtfht3b534rlteesk34/98284498108.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/26819312484.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/76884477216.pdfIn PDF document text
    • http://from.ua/upload/articles/2021/06/19/files/moxogiz.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/zulatikusikinepis.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/58939000250.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d97204a431---sedapolilevizilukad.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/f186ejsbaqri9bmb6l12gga9nl/15638525622.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=fatalities+mortal+kombat+trilogy+android+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001280d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1280D 16540 bytes
SHA-256: fc306beaa5b340e611fdc43a5832d489ba7cf393a5e4d416bbd2f680a25e986a
font_00_sfnt_off00010ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F16 11108 bytes
SHA-256: fbe93932cf6f8bea55a0817bafd8118ad4a263f037a6e88b1845166e4acfbd4b
font_03_sfnt_off000158d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158D0 17124 bytes
SHA-256: ff444e4cc6a78470da5b9bc596e2c4279a3fdbda32675fd01ba1826450408832

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