Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c09660236b83cd…

MALICIOUS

PDF

82.0 KB Created: 2021-08-28 05:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 525314cab9db209a2355d0c1bb512dbb SHA-1: db2735ea8363ff92d13c1bc037d7a543ab705dde SHA-256: d0c09660236b83cd410b03be8acdeb4e9634569e3a82bc26cfd42bd2253e06a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress uploads and disposable hosting sites. The primary goal appears to be redirecting users to malicious destinations, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/e99d6c07eddb7747d5a19a4ed7d3dcf7/janiwuruwomevuw.pdf In PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d495a0976d---7818996719.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/desobo.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/3bae84a162f005a3f0729c4386e7fc1f/86581728292.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/3bc3910aa4dc3980dca22de458f348ce/tigijozudewuw.pdfIn PDF document text
    • http://sakem.org/userfiles/files/89437298628.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/lilasudaguguzenuleb.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/17461252556.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f902a84fdb---vinogerupazofokegutulaga.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/090132417070.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/wemevapaxopinoboviruvasit.pdfIn PDF document text
    • https://htddienstverlening.nl/userfiles/file/62793761864.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/pazuki.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dfa773a92---22255461469.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/sofenijurejimafexabik.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/cdb9ce257feb6f51407c893c37dc2925/jikexutuwezejodapuvafofog.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b8dc474059f---ronovokexepexa.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a18f06a09ee---kepodetoganijofuzifeziwod.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27b11a1b22---79512357128.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/segezigefa.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/koratamegatemaxixuxo.pdfIn PDF document text
    • http://askort.pl/Upload/file/dumabofalijufezikivol.pdfIn PDF document text
    • https://puppometalli.eu/file/26412580938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=justification+meaning+in+kannadaPDF 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
font_00_sfnt_off0000bba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA9 10856 bytes
SHA-256: 38011d33c6fafb87faab933e8053f9487c017882c2edca000f6931ff111c0417
font_01_sfnt_off0000d499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD499 22628 bytes
SHA-256: dddf418fb37de22d2b248f64826e8ea255c2d958869ce77aebc311b006d9c100
font_02_sfnt_off00010c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12478 16184 bytes
SHA-256: 7b1fd549ae0a168396815c8e2f3ab17a2a64629da239f00513dd90720cf78394

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