PDF malware analysis — malicious · ac455d964ba22f8a

MALICIOUS

PDF

87.0 KB Created: 2021-06-30 17:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: def23d185c8357ffd2bd3fc58c6e0392 SHA-1: 4dfb6256a355480a6ffbd35ee3f25c455e9aa62e SHA-256: ac455d964ba22f8af47d1bdbafa61b14f4d0ca4c6a4d62e689af5b2ff1c77837

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of 'utm_term=morphine+injection+price' in one URL suggests a potential lure for illicit substances, indicating a possible phishing or scam attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/9a193c9a3ae7e0a155c745e5aac68daa/13272816803.pdf In PDF document text
- http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7b561ff3d---25037307448.pdfIn PDF document text
- http://bollywoodsalonskokie.com/admin/images/file/30164571177.pdfIn PDF document text
- http://global-insurance-broker.de/downloads/83041302484.pdfIn PDF document text
- http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba6190db4---91345976414.pdfIn PDF document text
- http://gialtour.it/themes/userfiles//files/59203262548.pdfIn PDF document text
- https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/bfa542641bcdee00d03ae7f31dface94/tejemexilur.pdfIn PDF document text
- https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/eb3nl5men34qnhdr881vfectbg/99944509988.pdfIn PDF document text
- https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/97dcee6d00ab688d4ee2ab34ffc128ba/41964820037.pdfIn PDF document text
- https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/5fd082d0f2e56714dd9408ad859cefc4/lenurezetofapelavavinopas.pdfIn PDF document text
- https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/50b157690b7aef94a9d6c0b94087f126/31616462801.pdfIn PDF document text
- https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0eaf870cfb---13926203165.pdfIn PDF document text
- http://gtlmarinefuel.com/userfiles/file/65695941912.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34a4718b51---95096610209.pdfIn PDF document text
- http://amuseonline.com/absite/userfiles/file/wilolinobizir.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/3d34a58261506a6f0d794827312eb2df/gipezux.pdfIn PDF document text
- https://medicentrumnz.eu/medicentrum/files/file/nalixogifudaxu.pdfIn PDF document text
- https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160757aa08c131---14693094928.pdfIn PDF document text
- https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/d98fa64c57bcaf56d5e11b233331367a/23990130462.pdfIn PDF document text
- https://doublehair.center/upload/ckfinder/files/kifokabuzuzat.pdfIn PDF document text
- https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/u1r6rk9fe98aee0g94v5ipmrjd/vojumaputurudizepoge.pdfIn PDF document text
- http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160864cf14a21a---39195193496.pdfIn PDF document text
- https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070e9420b65e---60021264818.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d35cc8c2e---11839595954.pdfIn PDF document text
- http://tikatalog.sk/_files/file/41775638091.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=morphine+injection+pricePDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f098.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF098	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000108af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108AF	10216 bytes
SHA-256: `30b8f73c72e202397d4bd5c17229c32f381e22861142adc45b4acb8eebe37fe3`
`font_02_sfnt_off00011f7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F7B	17404 bytes
SHA-256: `026b3e30d52f1813004b2435f6ff1509920b3b96f7595cd5c45504f35c285aa5`

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