Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70a0954965ac536…

MALICIOUS

PDF

147.0 KB Created: 2021-07-04 10:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d1161f4eeafa45d0a3f435d8e90ce97e SHA-1: 011d8942a5cfbeaf064ce2e61fc61aadfa05f946 SHA-256: b70a0954965ac536a489fc4dcbcee2db0264fb7b0716f707b28511961cd4db6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress installations. The primary purpose appears to be directing users to malicious content hosted on these compromised sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4e3493fec---25412834788.pdf In PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16095c9c941e62---61629086181.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/liql9r9n4dcckkj53vrkgt5o8i/18053088958.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/famaweruzisotewejamed.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160855aa7026e0---pujelotugeperodipabufuva.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d850c9dd2c---befarafapetag.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/399dc8c5976a6f486ec86145384d87f7/rojebusugiridejibibuxor.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1624911831.pdfIn PDF document text
    • http://rybczewice.pl/userfiles/file/12237291531.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d4552c1f84c---54992434022.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/13446321519.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/35603754086.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acbae55f809---jatimokebafuvobel.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/xojekosuxo.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ebb6e5be2---50139742344.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848eac7ffbe---10640275592.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/tasakajig.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b73b5f3b64c---12089319797.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c20da5af3---tipapijozejuvidewoba.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1812ee330---35403106767.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/a7b5696f438c62d375730f18dc62d762/jizuzipilusewasira.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/89495527992.pdfIn PDF document text
    • http://slphs66.com/clients/e/e6/e62fa13cff665df70d7481f632b33819/File/41876112901.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/0gbu6hhgipi3pfd1trq7mrqrkk/fovane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=development+of+transport+in+india+pdfPDF 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_off0001dcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCC2 10724 bytes
SHA-256: f94e2d34c71b2a807b4e8c74ddfacd41132c8b149040bcb0bdc627ac0e9ab553
font_01_sfnt_off0001f557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F557 18520 bytes
SHA-256: 973a72393d1c371c0fe52afd6f41c49790e4fcce9ec05eba015b83cb6acb8f12
font_02_sfnt_off00022607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22607 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.