Malicious PDF — malware analysis report

Static analysis result for SHA-256 94387ccc08434362…

MALICIOUS

PDF

87.8 KB Created: 2021-08-17 21:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 8c2b2ccf48c5fb8abad8e2a521f41bdc SHA-1: a056985e3d51185e2270578054ea6d25b3a27656 SHA-256: 94387ccc084343625e31f2227313382a780451ca469c99e395f2b5db70da5ebd
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://twr1115.net/files/fckeditor/file/42761969975.pdf In PDF document text
    • http://cropscipublisher.com/files/upfiles/file/87813084333.pdfIn PDF document text
    • https://foursservices.com/nbloom/fckuploads/file/43358976304.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7a79e9e8---goxolijotulejerugulamuxa.pdfIn PDF document text
    • http://goreskyreunion.com/clients/b/ba/ba087d28c24afe6c5bc45fa062332e47/File/15289438448.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/92419283567.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/23387069028.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/45530807058.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/b4uqhv5iaje6qjfrus3b64solf/xegenezezifodudix.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/xerazejefevinemimaxawevav.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/33s3nclf1cvi35jtcvcouupc07/568892330.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/15475602500.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/7ec99cfdd802a01229dfb917a679d59e/sawapekilef.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/3751591d4d7ba4da2e7b7fa4f7b10d55/pijile.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/rilefarexeb.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/34717077796.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a931d2a8747---mudiwilesujimo.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents//files/76450109323.pdfIn PDF document text
    • http://etre-belle.su/images/file/25812557687.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/64a828aed34a0dda57b706ced9836c35/92476106107.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/9596482a75519a8aa1ebc2c847799a6a/witovasemuminavubegu.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/96d89af139d18731138e971000ebba18/49044338228.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c96100251---vovowerutup.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb639c3cb9e---5515825699.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=biochemistry+mathews+4th+edition+pdf+downloadPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/dfb9f9fa05cbb6bad3a5b8e821a27fe0/83092070269.pdfIn PDF document text
    • 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_off0000f291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF291 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA8 11216 bytes
SHA-256: ea6888f8b1bc7e812095c35bf2eb7e3da1b5a76b16e8d1439115bbe3de71fef8
font_02_sfnt_off000124df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DF 16804 bytes
SHA-256: b222c8a5e9ebe2352eccaeb8788361fb960c996525bdef9ab8821b77ae1f9a6f

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