Malicious PDF — malware analysis report

Static analysis result for SHA-256 360591251e265991…

MALICIOUS

PDF

88.5 KB Created: 2021-07-13 23:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06a20c48571f33b13d4f5dfc0ebf246c SHA-1: 02d8e0478b4f3c172aac2362e6a457bc3cfa8464 SHA-256: 360591251e2659919074aa8fc25ddf3c66a6adecc755fbbc8eac62ce490b534e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the presence of numerous embedded URLs and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97e54f06ae---tadoda.pdf
    • https://tskrea.com/userfiles/file/10411836939.pdf
    • http://xn--eyt274i.com/upload/files/lipevelik.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/hhdnaclsuo9efu0rufsbbi5a3t/fonikalorotipufuzodufu.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/846ff0f982c48eba4f39d200b65e1669/60574554709.pdf
    • http://photou.cc//ckfinder/userfiles/files/petaxinesisuzetetozuguza.pdf
    • http://thsport.dk/ckfinder/userfiles/files/videfekobiri.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/fd4ec1a7211ab09056fac2d10ead2a22/87771368034.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/ad36d3ac245a85d33af9499c9fe57cac/363941093.pdf
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/miduxet.pdf
    • https://ivaco.it/file/83643806244.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/rek60r2dbcko3rnanjs33dtf0l/5986302014.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/iu1b1kc61etlg9gvssh1th13tu/43650315268.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c82c44fe8---65234273475.pdf
    • https://ochronaskory.pl/pliki_user/File/bapuwe.pdf
    • http://kaithompson.com/userfiles/file/65358389339.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/13fff944b05d690b086eb7a538f5fefa/51525942377.pdf
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89347859736.pdf
    • http://tele-fonika.pl/upload/file/90486830654.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/89d13d6239da625691dca9c1f96bbd39/telovetile.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae252ed6f24---17617664085.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=extraterrestrials+on+the+moon
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca7.bin
a470142189b6d215846876389853433db9673b22ce6d29387babcc7bd376f42e
pdf-font-stream PDF embedded font (sfnt) at offset 0xECA7 17896 bytes
font_01_sfnt_off00011aed.bin
5b3c947262022625ef2d4cfb2d0fa10a94f23c97611fd4c7364bfcc62a76ce6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AED 1732 bytes
font_02_sfnt_off00012321.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12321 16792 bytes
font_03_sfnt_off00013b38.bin
03633730c550c2751a445b6a878255f1e1394b370aa8b74b9abfafa318209454
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B38 10456 bytes