Malicious PDF — malware analysis report

Static analysis result for SHA-256 091cf6d9f9e33b7b…

MALICIOUS

PDF

90.8 KB Created: 2021-06-27 08:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c2d5d2b1d2384e3b95c5f6c51c6748f SHA-1: bd40016d19481dde29aaf76285d8116937523634 SHA-256: 091cf6d9f9e33b7b4cf97734059bc4232618a8614a3974b56a8b481f1ae96d05
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the ultimate destination. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ht6ne92k3mi4o9diu09sones11/zipiwoxelexizexujivilozif.pdf
    • https://motelandratecuci.ro/userfiles/file/33914572101.pdf
    • https://ystechpro.com/nbloom/fckuploads/file/64924025158.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/6d450ab4fa816f4e1384a68b6e771c30/94834421065.pdf
    • http://bienbao.org/uploads/files/97390809592.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/ead2dr0ebhhdh9q819mb2a67d7/13817694030.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/472c05254764c578182fd23d403600d7/84892322665.pdf
    • http://fautographie.org/images/userfiles/files/ledab.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d752345ea3---pufoxadabubifejesivelojik.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0a00e83cc---5744434838.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a084c11930e---runeze.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd6a241a97---16746771812.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a2219cdec06---18177717786.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/qehfv5fi7b53jj7u7ef1rmgi8f/56526146536.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b9ca95259---52785889662.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fd591f4fc---51567334246.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b2472bbc257---damuwaxofoj.pdf
    • https://netshopnepal.com/userfiles/file/91840367353.pdf
    • http://aven.su/userfiles/file/65625856571.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be788d4147e---kuwotojutidegaf.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160accac208c36---puxivilamajasevoxi.pdf
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160749a0336722---63402855033.pdf
    • https://ildiko-szepsegszalon.hu/userfiles/file/duseximizaf.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160be6fc58961e---pavudesevepiba.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=green+bugs+on+squash+plants
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010128.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10128 16792 bytes
font_01_sfnt_off0001193a.bin
3a75667327c4527221969468bcbbe5f7fe1b169cf76a73c2ddc5344dc21ef42c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1193A 16992 bytes
font_02_sfnt_off00014578.bin
73a9daf4d04fab1f654fe4e843513d8b4152a11e9a83fb847f3d06cf925f7c65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14578 10864 bytes

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