Malicious PDF — malware analysis report

Static analysis result for SHA-256 d069235d8bf5bd3e…

MALICIOUS

PDF

132.1 KB Created: 2021-09-06 02:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 012453fd6efa3a7d646722e2d2dba372 SHA-1: 0d6bf77d9ce98aee2836eba4d6d4762b524aa856 SHA-256: d069235d8bf5bd3e7322fb4782565227cc81019f583b59693ae940eda15df0c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF's structure and numerous external links are indicative of an attempt to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/5f1c15a99c9cd243f2d543596915e4a9/wubowipuluxosasejapizul.pdf In PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089722e12dce---vininivilopewekibozef.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/toladodirejovezonuneragi.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b124390dcc4444091774e8c8c32a006e/42644338121.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/496bemqdhsfimcr5dse0hng124/71216785844.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/xoravene.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/51237553120.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d63385ef1---naguzifigutimufopalojiti.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/47aa19087f0be41813acb4e4ee116bf9/38331032518.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dac3b5b6423---61008504785.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/misinaxajini.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/b49dfd25ad5d9325d261a9aa4bc60876/josulokebewi.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/rexezel.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/b0419d81870bf51ca05324aefc8b74b8/nipatusunalixegow.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/pieh1pukjsgcppngjg4j8hdirl/20627443504.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/89927292753.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/98674961398.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/mixapovulix.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/18571cd9a25a4f49c085694c99b22d00/97508292791.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/kafovamifatezifivujoli.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/sotusagobukidavibelu.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/gijelumalebojegixoba.pdfIn PDF document text
    • https://cristalensi.com/public/File/lojopepatofaxot.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/nipopumipe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=droit+civil+des+obligations+congolais+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://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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19986 11000 bytes
SHA-256: aac54332e9c1c17e0f24da5877e3317d4573270a45e39d2f35d3783257f97387
font_01_sfnt_off0001b2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2C8 21912 bytes
SHA-256: 4876ede5ee1291e5ae4a962e9eac15f061e2511de102dcdb9cb5da244d05cddf
font_02_sfnt_off0001ea07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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