Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ddad07e4ce7894…

MALICIOUS

PDF

86.4 KB Created: 2021-08-16 21:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 335be98e234b50bbbcf07f80c7f40f44 SHA-1: 454f235d11b43bd105f56d5155cd1b0356a118bd SHA-256: c1ddad07e4ce789429f73c10197322a1486c1dad3c41ad5a89f1605c5c259165
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing or trojan distribution attempt. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns indicate a phishing or malware delivery lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b208aad6e34---naninegibinutevir.pdf
    • https://camping-du-lac-dijon.com/fichiers/tixeme.pdf
    • https://heatingboiler.ca/fck_upload/file/98392623409.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f8cedab6cd1---mutawikosuvamatediximop.pdf
    • https://stalbeckers.nl/userfiles/image/file/76875540702.pdf
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/patut.pdf
    • https://china-glass-mosaic.com/userfiles/files/20210730_071001.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/cmqnoedfedhljbqr7hqibvpkg0/nogis.pdf
    • https://nguoixunghekiev.vn/userfiles/file/46520196162.pdf
    • http://voszveszprem.hu/_user/file/wizopobuwimi.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608185a058022---74075489385.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607563d3e4e64---80712531813.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/ddakdaopnt2l5b76h10go6crah/31537774470.pdf
    • http://provia-events.de/pics/fotos/1/file/mudaredasawugefidijebegoj.pdf
    • http://easternsheep.by/app/upload/file/jekokavo.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084b27b43349---witorix.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/6cd9a1e7712e5868441e9e2c7322c571/tugonunovumeravikib.pdf
    • http://gsprojekt.eu/userfiles/files/99157617527.pdf
    • https://batikatravels.com/userfiles/file/14899088568.pdf
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/kaxanoviropotibenakala.pdf
    • http://1000projects.ru/upload_picture/file/lemivoxado.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3df12bfea7a99cd36c0c422d5c5606d5/vosebemuvuf.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3caf511306---18898597555.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607577ab5a4fa---gibalemerupajixovikaw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+pair+jvc+ha-a10t
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 16792 bytes
font_01_sfnt_off000107dc.bin
d852569c645b2f110bb6ede1319b012f400ccf948fc0233e088138084e52d2c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107DC 10500 bytes
font_02_sfnt_off00011ff1.bin
91648d9407a55b240a321ceeacf81cc1c1ecb3ca34b8a4248b1c20d6f5f8dbdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF1 16896 bytes