Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9eef902caee272…

MALICIOUS

PDF

94.2 KB Created: 2021-07-25 12:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 425962ed4aaa66e7493f42a46b039cae SHA-1: 0b5ab9080f9c64dde23abbac2a76c370f464648b SHA-256: 2c9eef902caee2723178324c45ba2179eec6f42e9d77d5d71feb9bc1df1a2eb1
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to external PDF files, many hosted on compromised WordPress sites or disposable domains. The primary function appears to be directing users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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 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://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4ce495715dbde48eb774888824993b51/jufabevuvamutesajuwajo.pdf In PDF document text
    • http://premium-t.info/files/files/disixejajarivovekowukede.pdfIn PDF document text
    • http://1parareunion-club.com/clients/4/48/482fc251494624b09083a87f212a12d7/File/19129711727.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/efb17f07d6557b51477fb63fe283abf8/noxitozivaxitu.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/537dc1dc9403e63d3f67f6e54ecb3018/sudipupuxofo.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/kifozavazadiw.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/46519200890.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb023220230---67134290316.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/rumepajidusiv.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/98084779741.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/jagugekigumit.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/34938140805.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/zutufodufonefugelutepu.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/b7ffb0c467e3b0de8cee9800d6d49feb/mamilive.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/25205676a980b41037d454c5e2732848/likigifipavawivediba.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607670c4be3cb---6632738324.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/jua8sgn7gfm2c1ep1kruc8m1b9/79426682685.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/14311283825.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a20d661a926---72127671031.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/29988306505.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/26809773613.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/gorusonezenal.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/d0264709895071e30918f1cb99ec39cf/89894521255.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/nejusigexizev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f368d5f2692---44296122298.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=personajes+reales+del+cartel+delos+saposPDF 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_off0001071b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071B 10544 bytes
SHA-256: 22fa006cc4a0206809e9388a5ce74b7a2f3449fc2e492da9017c73bc232f11b5
font_01_sfnt_off00011f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4E 19788 bytes
SHA-256: 42e1d8ae2e97c4267ef6183a7b5b5631db9f59a0530d310d01918180a37b7f5e
font_02_sfnt_off00015104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15104 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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