PDF malware analysis — malicious · 462cb69d3eb80434

MALICIOUS

PDF

93.0 KB Created: 2021-06-28 17:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 2994513086e4677eedb23dfe4565f3c5 SHA-1: f929d1308de4f5d9e59567b6cde9ce558ec3ebd7 SHA-256: 462cb69d3eb80434beded0fac0178f105a91738f7c39d39c8267d968f0ff0a57

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm on compromised WordPress sites and a callback phishing lure, prompting users to call a number for issues like billing or refunds. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content or facilitate social engineering attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
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://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e431f96432---tirox.pdf In PDF document text
- http://flywings.sk/UserFiles/file/54615113475.pdfIn PDF document text
- https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d9abbd2d2---zesazojafu.pdfIn PDF document text
- https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609850360a9a6---gisavimodezijugedosazu.pdfIn PDF document text
- http://fedime.org/imagenes/63177562611.pdfIn PDF document text
- http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c71c5fab840---wevurebilijesegotano.pdfIn PDF document text
- https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/910c8039e79a4fb0cb773fc40eed8269/kerifolepofasenuk.pdfIn PDF document text
- https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/48bc6e574f4d1d1287ce8b84a279a779/20263224733.pdfIn PDF document text
- http://bfr-bialapodlaska.pl/userfiles/file/nugedewa.pdfIn PDF document text
- https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/edea04bb0e4d65e486e95aa339ba53ac/wakerewunuzabim.pdfIn PDF document text
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/bcf547047617545545662692558c5c0a/84662489854.pdfIn PDF document text
- https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/113445daf75edf0dc8511c1067cbc35c/38772583574.pdfIn PDF document text
- https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba76c0f07a6---54076278463.pdfIn PDF document text
- http://alt-1c.ru/userfiles/file/wemepaxigesikuroj.pdfIn PDF document text
- http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d30ac532c4---63981583531.pdfIn PDF document text
- http://clinical-pain.com/pds/userfiles/files/pogetexoderatujow.pdfIn PDF document text
- http://mitcostruttori.it/userfiles/files/dufazisap.pdfIn PDF document text
- http://solarhomepage.ch/fckeditor/editor/images/file/98503638707.pdfIn PDF document text
- https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/39dc04203b3eb9ba22cfbebc7aadddbb/nabavekazomuda.pdfIn PDF document text
- http://extracam.es/app/webroot/arxius/file/36156261830.pdfIn PDF document text
- https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/5093668a522ba9c0fb5b5760974f2204/dalibimosunexil.pdfIn PDF document text
- https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/b2f5c254553d02c7ed6a131c604daf8d/vojuboxonodamipe.pdfIn PDF document text
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/93f078ec1d9aeaed76df42036116f75e/wobowoxuzimisuz.pdfIn PDF document text
- https://menu2uplus.com/images/file/72255768485.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/c33f48dc21fe36f12ed1adb85e29620d/suragikoxem.pdfIn PDF document text
- http://mospolytech.ru/storage//files/wodiwesulosupitenitik.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab469d76e2---19899129094.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+much+do+i+need+for+closing+costsPDF 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_off000106b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106B7	17184 bytes
SHA-256: `ec85486e66ce0dca32d77299b46dd06ffb983a179842ffbe9e67a8f7a7923983`
`font_01_sfnt_off000133d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133D3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014bea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14BEA	10936 bytes
SHA-256: `6710e0dd0f1e9cb5738015405480778819d9137eb8e52c070ac1f013405f79ee`

Open this report in the interactive analyzer, or submit your own file for analysis.