Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb328c1c2e029ab…

MALICIOUS

PDF

83.2 KB Created: 2021-06-26 21:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d1007ad44ba8c5d81e2b10c73c62afe8 SHA-1: 7097a7d0551b53996de572039369420faf8dabd6 SHA-256: 7fb328c1c2e029ab40e31348a3beada86d781b1bee9d36af68f94671ad6387d7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous embedded URLs pointing to compromised WordPress sites. These links likely lead to further malicious content or phishing pages, serving as the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9856

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://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/micrf46ndu2nc0gqc9r68c553d/49879406730.pdf In PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/e8305d441dd42395c21f3150dafdc3ec/41179522134.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/3ef67a06f23cbe451084ed5d3bac2d21/daduwevekew.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160745f601e18c---74063498264.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/03b3304845155c7f71b5369b087a8228/29057809594.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/47941955841.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/3904bec41b9681d37fbc2cf6b6597981/fiwulim.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/51277642751.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/50004900079.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/tovuzar.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/metoteri.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/namigebunevujosu.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/86094579360.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/8e53a5e165910d2fda1babb9b315ceb6/terugesemaginape.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a588e25539---90943920142.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/tuvuvitutilabul.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c39c1ddfd---xezuperegozega.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/3084902986.pdfIn PDF document text
    • https://arerp.kr/data/file///77685103459.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a13da98950---55744990200.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/repal.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16096b86f49894---99580026879.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a3891eaaf34---kolaropuwalegokusabulaxo.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/vopipafuzepuvaxuzigogopu.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/55a90518caec72dc777db6b9eeec7c90/98146335747.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/45340437503.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f0fc4cbeb---xutevorusulipo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=faded+for+pianoPDF 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://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_off0000e529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE529 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD40 10156 bytes
SHA-256: 0be9c58207457a8e48aa60105e5a86ae0ebe1ad2a22c3cd06ff2ecbce7ed8643
font_02_sfnt_off000113ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EF 17660 bytes
SHA-256: 7750d022c829984d43648c1332a695528e409a5db2dd1be7469f4b16fdc93016