Malicious PDF — malware analysis report

Static analysis result for SHA-256 12868b7992c00596…

MALICIOUS

PDF

104.2 KB Created: 2021-07-30 04:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e177fa9e229cef893475bb305ebf3abf SHA-1: 6ec1b463d3bfd9afef5b1af4a6a9f9e205df5e1e SHA-256: 12868b7992c00596bc5c6ec3120526f61426e7c3d154bdefea695771a160bf88
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised WordPress sites that host further PDF files, likely as part of a multi-stage attack. The numerous external links suggest an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f122b4153---tewiwikaduvezaxeferebe.pdf In PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160ada6312c632---zizopumawajomod.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/7e34459e941b4da205c4bf3b2a7aa79f/65624703852.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/793c2ceed0057293e36f795b0b3cd481/bepewozufu.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/wupitefogorumo.pdfIn PDF document text
    • https://agrolliance.ca/ckfinder/userfiles/files/rarotifamosurevenapiwuzeg.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ec5921d20---87720940897.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/togumavevupulis.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/e7a1a4ef0a8fadc2ac420612454342be/jumetuxogelikuzi.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/176243547460a8a45239431.pdfIn PDF document text
    • http://stonebriarranch.com/clients/876969/File/66304252286.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706915466c8---82611259874.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/34adac2c220a1aee5267f1356d6fea4c/15564443364.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a39c397599e---87582774300.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/nasetiwowi.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a8731efcaa379d5d7e6266251a0b01cb/babifobavor.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/79866846732.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98c8cc601e---29043963089.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/4kii9jafqhltrpda308kblqprn/kijexilixokexo.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb96979397---wamowejo.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9e12aede52---68136107007.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=june+marieezy+birthdayPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001174d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5E 17836 bytes
SHA-256: 1a565b3b70e1af1a7101784749f25d10867a2efa5fe5e98f7f7c4feaa210f991
font_02_sfnt_off00014aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AEB 18052 bytes
SHA-256: 5f325aa80cc89bc7409c259bdb6bbf0c867bf6c3f7c1e849c41c6876a0a03b16
font_03_sfnt_off00017a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A27 10584 bytes
SHA-256: 62cc4ff1fc0ad5c65bb1df6555102b74eef45caa71ff1d899e782c9c4e5d4214

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