Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7862cb7d32f70c5…

MALICIOUS

PDF

85.9 KB Created: 2021-07-17 06:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 67dbcae536b512c00549a17f2a57832d SHA-1: e53306f337e1f30828c71ee23b3ea4a3c02b17b9 SHA-256: b7862cb7d32f70c52ead9c600a967410513a6e0726bbbf1c0b58015c8743f184
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and ML classifiers indicated high maliciousness. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and UTM parameters in some URLs further supports a phishing or SEO poisoning attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://narcisse.sk/editor_uploads/files/29058178732.pdf In PDF document text
    • http://naplesredeals.com/userfiles/files/82642180074.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/foturewomobitux.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/5inrgvqk8a9vht2msve8ott700/fefumizabazemadufejobabi.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607633cb28c93---34055569054.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/94808460055.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4036264ed7---85929040019.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/ae3dd7fc98435144db19958f1204beb3/9623409762.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/231cb3a72aae2d02520f2d5538efc2df/30644213743.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/46807058214.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/36ae53101abd66db2743410330354c8a/sogeluxiwolo.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb979d2bfe---matadisafe.pdfIn PDF document text
    • https://digireg.dk/upload/dagafagu.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/f7l2dqkr7e09fltkl2nofkoh14/guwudasagunuxetajikosuto.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56e5682e1a---visozamiketekiwunevoxi.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ca765083c---49543974769.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/76224555167.pdfIn PDF document text
    • http://sammyurias.com/userfiles/files/45118951299.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073513bca535---wovisewera.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/957a8ef1f0fbfbb73c9a2f6d022af2fa/45619547007.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d63a107bd29---74858954921.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/f5fb48cc91c962b93a39df99d5e80260/xuraxebefiguvapejiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=causes+of+wheezing+on+inhalePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7F 10572 bytes
SHA-256: a944a93c263157becf410ced08d1ea0fb998fb1c605d0e5b6cd120e02817a3eb
font_01_sfnt_off000104a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A8 17556 bytes
SHA-256: 1ef1266e332290748f6abff580d891ff3792a33c843b1488e64e1a74d70a863b
font_02_sfnt_off0001327a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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