Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc029e8065554354…

MALICIOUS

PDF

84.9 KB Created: 2021-08-24 23:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 94d21564b9d252fc521921957167a87b SHA-1: 01937fedf15c43d9c395730da96fa6ee5f7ec2a2 SHA-256: fc029e80655543547ab0cd1c65768e1ea23c5e1751560f3470a129e6e20026db
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as containing a link farm pointing to potentially compromised websites. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. The document body is heavily obfuscated, but the presence of numerous external URIs, many hosted on disposable or compromised domains, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/7da8dce42ae539f054366b962e020cf1/galibuk.pdf In PDF document text
    • http://pattersonandoliphantfamily.com/clients/875492/File/76578936030.pdfIn PDF document text
    • https://virker-ikke.dk/files/66373840982.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/kovipobamibepir.pdfIn PDF document text
    • http://topas.lt/userfiles/file/geditekaniwakiwuf.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4c3177a84---pujalebamofepasidifak.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/83048599274.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210721_e972e.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/31dgm48q4fs4bsvb2qdpij7u09/setodexidizodabidorudoxe.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/12543249670.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/ckujb769bmeqdk30p3b20olpo3/wisil.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/mu0t24j9qethrf9qopmmq56fag/nisefusogibenirusaxizu.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/rukenajesovemureso.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/76922864355.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/07a313164a33926beba5b6423fed5c5a/30028078381.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/d169d67ea8192285fbf2312c7e0d403f/konenuzor.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/4lnu76ib9b3p4hf2asknlfl89i/polobojexibizaxulodoveme.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/def37e40c8cd1d113e7ca356bc93a91b/vamilijuvamejejepes.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87fa328fa---87929792805.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecc54449ec---45780439111.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609402d1d7f1b---dopoziluzavowoj.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/2893937480.pdfIn PDF document text
    • http://www.ks-zahnarztpraxis.de/upload/files/49453266855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=production+plan+in+a+business+plan+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_off0000e985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE985 10856 bytes
SHA-256: 7b59d55ddc130c9d44a4c1a6679ca403838278e071dd71d31aa9988bb9d3426d
font_01_sfnt_off00010273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10273 16544 bytes
SHA-256: 5b912b5d06ca85519080e1f07d6bdfda3a2fbf371b86b6e2d82d2190deafeec5
font_02_sfnt_off00012d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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