Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0380faecc69ef2…

MALICIOUS

PDF

88.6 KB Created: 2021-07-22 06:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 314fd9d8689cc39229706e63f890d908 SHA-1: 993b48c163212f73815031f0fe4b7d46fc57bd13 SHA-256: 9d0380faecc69ef2f902a493c0ead74456166551525d58384b5f21c9e598273f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload sites and other disposable hosting domains. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 http://panziofabian.hu/fck_kepek/fetur.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e75f7707ab---13268427773.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8be1663ce---ziguremexuzegasos.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a95698fba---momuge.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c351d21701e---bawekezodukefikimifapitik.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ef13f719981c61e13b0f16a7c362f95d/86028619392.pdf
    • http://drairtools.com/ckfinder/userfiles/files/41708358224.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e529aa87672678f86972f63852378d28/lesagikipivuzu.pdf
    • http://prtourusa.com/FileData/ckfinder/files/20210717_056891BA3C310AD1.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16072a9743c1f3---kebumokanagigoj.pdf
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/baparevosodanuse.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2ffad1f42---wopazaso.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ace9d9331be---velizap.pdf
    • http://ackerviewguesthouse.com/userfiles/file/86339374195.pdf
    • https://estoniapools.com/contents//files/mituwigujas.pdf
    • http://canxetaidientu.com/images/file/34125806957.pdf
    • http://hitecds.com/userfiles/file/35746189797.pdf
    • https://cihangirhotel.com/upload/ckfinder/files/59311480149.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f70eef92af2---27221132745.pdf
    • https://seitonsolutions.com/ci/files/8804101737.pdf
    • https://najlepsze-w-polsce.pl/uploads/93143428686.pdf
    • https://nabijdefossa.nl/upload/files/xemonojubaxotugigex.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/lnffcd93ullo1mu3qvg89oir07/8418828837.pdf
    • https://hanyauntuktesting.com/contents//files/76781804555.pdf
    • http://internationalnetworksolutions.net/files/
    • https://dm288.com/slicice/file/zufuvuzuzutupezi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=words+to+when+we+all+get+to+heaven
    • 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_off0000f566.bin
c1137dc9b9c157bc9e10ff476af60e476014c320b1f5cbb31e457c2ac9a70e46
pdf-font-stream PDF embedded font (sfnt) at offset 0xF566 10580 bytes
font_01_sfnt_off00010d5b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5B 16792 bytes
font_02_sfnt_off0001256d.bin
8c88c459aad29e511498d07b31822d38c71e13396497e9779ff5f93745225525
pdf-font-stream PDF embedded font (sfnt) at offset 0x1256D 17812 bytes