Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ed6e20679770b0…

MALICIOUS

PDF

122.1 KB Created: 2021-07-23 21:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4cd4cdfcd4a540cb26b50bb8ea3dde47 SHA-1: ec356da01e2395a895075e4c3c10cb6e39520ca1 SHA-256: 29ed6e20679770b08a625d4fc008cee582d835d6537b236f283a68413df05931
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm used to distribute malicious content or phish users. The PDF structure and embedded URLs are consistent with phishing lures or malware droppers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097315275d1c---32027467667.pdf In PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2765232db5---45808748110.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/36731949841.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac480e15c0f---xanojuxaxugewibakofib.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608366bae39c4---mivunaj.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/rikatudatutokubefutul.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/nawujifusujo.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/43839689167.pdfIn PDF document text
    • http://spoilersmensgolfclub.com/clients/865201/File/tifamenazo.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/dc105a6afeb1835c6065d78ae459de64/nakapatiferuwumareze.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609148c8f00c5---datonafim.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/54962146426.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/5f0f507a1b97c4b24ef66761399d1fd2/89493971603.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/0b55f1dbc7072fd10b5132e04470eeb2/besazikitunosizenugar.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160809a996e930---88105879182.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a109e321a06---68904948662.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/dbfmfnfcldass13qfc4mlp80hv/9112825672.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082931c817ca---doxatapogur.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/88ed82539cc0f55d30feab291040feb8/26069526073.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d6b27eb4e3c2c9667762f824698d12da/24125987254.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=s%C3%A1ch+h%C6%B0%E1%BB%9Bng+d%E1%BA%ABn+%C4%91%E1%BB%8Dc+b%C3%A1o+c%C3%A1o+t%C3%A0i+ch%C3%ADnh+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://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_off00016fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FD1 30772 bytes
SHA-256: 9428037b241eb3adcbae3cfb351d8153f33741eac44cc73da2c85d4cd238c49a
font_01_sfnt_off0001ab4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001c365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C365 11948 bytes
SHA-256: 39073d88c7b58e6efc8c7395f88e9fbce863250537486537e210af9b7a40682a

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