Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2a44dc46d2272f…

MALICIOUS

PDF

78.7 KB Created: 2021-08-16 21:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 771e4df42ca848406fec245c6bd5d8fe SHA-1: 62a75aa5c0b9768e106d20266d582a14f30db119 SHA-256: cc2a44dc46d2272faa651f6ed89b0f73546bbe826beae77a5040425f9cdbd95c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The presence of JavaScript indicates potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/qviodlfejk7m8q9upcp3an4pd4/mimisisojukarilo.pdf In PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/9016065fee597fbf0064f6afe81a3c32/zukaveritoves.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5655b828d6---xovafizibejelefome.pdfIn PDF document text
    • http://lungtransplantopen.com/clients/d/de/de7cc03d42bda6b8b84c8ac9728529bb/File/71340140354.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/m7sndnssh5l1hl7nhsfikploj6/30787553471.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4d2a66996---rojuw.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/gemabewoxewitig.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210811020847.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/jovilenututu.pdfIn PDF document text
    • http://aimic.com/userfiles/file/52396502310.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fe6c62dae54---92509817594.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/lewupuvabawa.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/85572878892.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/07/file/66238422939.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/84751380669.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f7b5f027f---33607293380.pdfIn PDF document text
    • https://solo-enoant.com/content/files/files/salatebiriwatazoz.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/tazubuxidoxopawokigidejiv.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/92198312072.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2caf0992ec774e9d6cc24d38d198119c/41681299870.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/jizotibazetidubomumam.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a21e7f113---fugegexaxefodozaguvi.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/buxiwavipafutad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=where+is+the+6th+barn+find+in+offroad+outlawsPDF 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_off0000d17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17A 16368 bytes
SHA-256: a8b5b06643fab3fa8570729df3cea7a4436dcab18a23108c9ea12d7c0fb96050
font_01_sfnt_off0000fbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CB 10936 bytes
SHA-256: c84337b8e5da407e9c52e06bd246192bc4a4231e09322b0bff3b37840cab0aa2

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