Malicious PDF — malware analysis report

Static analysis result for SHA-256 9367a6b748576a79…

MALICIOUS

PDF

90.4 KB Created: 2021-06-25 22:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 52581b9b7d23e9ab363384970299c777 SHA-1: 1f59fc0ba88c395034826a351a20f88ea48b6746 SHA-256: 9367a6b748576a7905b5e121d43ff227b5616e74c99f80d74d93bcc43cb5553f
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common tactic for distributing malicious content or phishing pages. ClamAV detection and ML classification strongly indicate malicious intent. The presence of numerous external URIs, many hosted on potentially compromised CMS uploads, supports the classification as a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087dd85ac810---fusajuxagupo.pdf In PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/tc5cq08f82oi7nba1mrcgujkin/47604764746.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/96af16e69962ecf51695e2ed49973c40/63388354185.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160996ef9f134c---38474006680.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c04f705c706---9535850345.pdfIn PDF document text
    • http://bociany.sk/media/file/jeboxitid.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e5500da4a57d2a49e2b304cb173c53e4/rovomuzudus.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e5adafdfb---53145866529.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/1ee0fcc77e0fbbbe59b9eac2261d56f2/wagoxugezilakidibafosuja.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f626a9f2e2---36028588897.pdfIn PDF document text
    • http://ekotronic.eu/files/file/gudepemovumalelufipiwowu.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a20a29518---61493142982.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/dazewonalekunuji.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ca37f3c96---66164165370.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c11fa026344---tipaserovu.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/a610dil4cp7rk9g5bod51qgdgj/tiwapasotezekigukefosiz.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/6397711741.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/518cb08f14ad5bf8986148b47e4eba99/mexozobugitafide.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/aaef852a50d59b738ba6b29656433413/gelodixozetedesazezazusek.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/7986e4bd8c697846fd5103b2d7add8ae/88169797921.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/vakurenamavebiviki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=exercises+to+lose+inches+off+your+waistPDF 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_off0000fbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 17916 bytes
SHA-256: 977073dc2dd506b6b19997ad4b1e23d37be979c6785b053936266c1d92d0b6dd
font_01_sfnt_off00012b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B24 10816 bytes
SHA-256: c9351d1386d0c2d824cdb730d65494ac29389a710d81d5031d3802861fd959f8
font_02_sfnt_off00014425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14425 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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