Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0f9b8b99dfd4e4…

MALICIOUS

PDF

100.8 KB Created: 2021-07-17 11:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0e3bc6fce3e0035f335f4765b3863878 SHA-1: b57f5a0e937622a57fa8a53c4cfac6ea8c4657c0 SHA-256: 2d0f9b8b99dfd4e462e20ba3480e4f7ea1a76b1da951ee7066cef5c50f4175f4
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/smmi2eij5ikk2qrffnb3hoc5ps/43927738424.pdf In PDF document text
    • https://harkakotony.hu/UserFiles/file/39828167452.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/vafenavuduzijawupiloxora.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aa2c3a40bef6354d5e21ed7b35d9716a/34426227717.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16090d6a4c70ef---xatogulaseregubuwodurok.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/35658695864.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/8e78e67e3d7676b8788ad5ee5afb25ac/milivulafokazilepetikemi.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160869d446b077---momuban.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/0e137fb286f4f0c914b3169606908237/pesofubemutagulad.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16088c3b2e69ef---72806740992.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/nowezonepiwoxutufifif.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607658e1efa0c---vuwoxaki.pdfIn PDF document text
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/31821406317.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a390e3ad8f---78673655163.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b328b7cde51---86138871998.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/gobotasafesiwavubiwaz.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3fe009edf6---84713346229.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/f7ec7e7356690953c10569e2ba62d969/97653915921.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/44020304636.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16072d0fa08f02---27569800775.pdfIn PDF document text
    • http://suachuabaoduongmaynenkhi.com/img_quanganh/files/20742277864.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/2811984541.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=sware+party+definitionPDF 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_002_off0000f0a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF0A7 20040 bytes
SHA-256: 68cd61259be321a83d8af764b831c605c7319c0f767aa714fb609329acf7c33d
font_01_sfnt_off0001122d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122D 27124 bytes
SHA-256: f8bb6e61a91227a3fbde6cf24b067984cdb16ab1c4fef5a7df11ef49612df902
font_02_sfnt_off000153eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C02 10552 bytes
SHA-256: 0ff204e1a69466a2cda782305a8f02a9818974620e08c592f403c8132293d6f5

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