PDF malware analysis — malicious · acc9305c6626fd3c

MALICIOUS

PDF

90.0 KB Created: 2021-08-07 12:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 83bebc5650ffd2b2defec0db59f7d40d SHA-1: 13293e3a58be8432139a5c920e44695962bf2470 SHA-256: acc9305c6626fd3cd4031291fb8a2ddfad79da83235d5d7f03ae45fc0382e262

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites or disposable domains. The presence of 'utm_term' parameters suggests an attempt to track user clicks, common in phishing or malware distribution campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9913

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://cructi.ru/uplcv?utm_term=new+bollywood+movies+hd+download+2018 PDF link annotation
- http://packamate.com/userfiles/bexupebo.pdfIn PDF document text
- http://drjoecarver.com/clients/49355/File/17867458098.pdfIn PDF document text
- http://www.naraihillgolf.com/admin/userfiles/file/vefegowuj.pdfIn PDF document text
- https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/1es5j9fg9o451mepc804g1fpi6/20212559676.pdfIn PDF document text
- https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/de1674cb7f38f9811ece1fdbf671148a/daxokiwikekuleraf.pdfIn PDF document text
- http://franzoesischebulldoggen.eu/userfiles/file/85919117843.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a2a5c3e5a---xisijomupuputevajuvo.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95a7da7a0d---wisasitije.pdfIn PDF document text
- http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5ecf773e0---1651181122.pdfIn PDF document text
- https://alexandrapanayotou.com/web/images/static/file/jezonuzorefi.pdfIn PDF document text
- http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f00c917c4---55700457651.pdfIn PDF document text
- http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160db187060193---84717923204.pdfIn PDF document text
- http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4a5bdf7bb---tajizagejizi.pdfIn PDF document text
- http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b50ea820f3---39024007845.pdfIn PDF document text
- https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/tp5khbnabal2u7dqvd0o8k00m9/tonaduluwugigomeporudego.pdfIn PDF document text
- http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acf1ccb1df8---49657299425.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/a4a8b0928060855a8ef1205f201514b2/povekekimikozamumes.pdfIn PDF document text
- https://immo-cjeanpaul.lu/userfiles/files/nibunen.pdfIn PDF document text
- https://finatwork.com/userfiles/file/lumejukezeniwilasemori.pdfIn PDF document text
- https://ancoraeducacion.com/images/vapejipuzewapipagi.pdfIn PDF document text
- https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/9ee3574e9501ae52b9c28177ba12d52c/jijufuka.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/t7pst2ktcrf2o5akbcta2qq1k2/10941116110.pdfIn PDF document text
- https://techlan.pl/files/file/90065157738.pdfIn PDF document text
- https://semsaesp.com/ckfinder/userfiles/files/sebag.pdfIn PDF document text
- http://thietbixanh.net/uploads/files/xudenulazufivevifarusixi.pdfIn PDF document text
- https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/34f577f7c58f24cd998823dd09775f29/fimimewevafarulojupoza.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fc0c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC0C	16868 bytes
SHA-256: `40c35d981217fe08ebc630d6f4e35fd3f0d4954b42ad9f4de454565e3b030212`
`font_01_sfnt_off00012813.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12813	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001402a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1402A	11200 bytes
SHA-256: `d1d0dcb3c0c3d4418e4af3935b819d73ff193d32cdcde480693880b2971ffca4`

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