PDF malware analysis — malicious · d7cc5dd37312b653

MALICIOUS

PDF

80.3 KB Created: 2021-09-05 05:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 04ecd9cdd650a8ca50000cd11e749be4 SHA-1: 2731009260bcadddeeaee2be163498e6a33b73f6 SHA-256: d7cc5dd37312b653e1ca394929a80e3621ee3102ba585259db582e266b91e3ae

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content. The presence of multiple external URIs and link farm indicators strongly supports a phishing or malware distribution attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/pn0hm6072o21spgv5rm2fqn6p3/nizifixopovesukuguno.pdf In PDF document text
- https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/7e25ec9dc33bbbae79f8f8bec2b7c83f/43417104214.pdfIn PDF document text
- http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077cb4f0cd47---mitajejozaxuxagax.pdfIn PDF document text
- http://edilgroupdigiovanni.it/userfiles/files/93980513107.pdfIn PDF document text
- https://dreamscapes.ca/dream_scapes/userfiles/files/72648969718.pdfIn PDF document text
- http://akademia-jedenastka.pl/zdjecia/fck/file/68038621427.pdfIn PDF document text
- https://emprenderem.cl/files/49949293214.pdfIn PDF document text
- https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160cdac0295d52---64116364128.pdfIn PDF document text
- http://nensi.si/upload/file/73929821059.pdfIn PDF document text
- http://sgd42.ru/userfiles/file/51262886056.pdfIn PDF document text
- http://ventensis.lt/public/ckfinder/userfiles/files/24291078391.pdfIn PDF document text
- https://propiedades.net/ckfinder/userfiles/files/19708159606.pdfIn PDF document text
- https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//paxutunimogapunixiwer.pdfIn PDF document text
- http://www.ettermanenterprises.com/ckfinder/userfiles/files/kediwefemuwijuri.pdfIn PDF document text
- http://mexvp.com/ckfinder/userfiles/files/vasefetifonupeturotaturaz.pdfIn PDF document text
- https://klcconsulting.eu/klc/file/foxabu.pdfIn PDF document text
- http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcfe5643d6---mibok.pdfIn PDF document text
- http://alnoorcity.com/userfiles/file/33367598601.pdfIn PDF document text
- http://purepassion.pl/userfiles/file/simogorokanuxuvowadibivim.pdfIn PDF document text
- http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072de64e0013---34849912360.pdfIn PDF document text
- https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/j8030an28fn06no1cpl92il721/mipipumuz.pdfIn PDF document text
- http://ipceurope.eu/assets/file/vujidejofi.pdfIn PDF document text
- https://eyetracking.pl/userfiles/file/61058124191.pdfIn PDF document text
- http://synowka.pl/galeria/file/2236097509.pdfIn PDF document text
- http://ducthoaudio.com/upload/files/bameje.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=regarding+the+pain+of+others+essay+pdfPDF 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_off0000d8f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8F7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f10e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF10E	10888 bytes
SHA-256: `888f43f3326b139dad322523b15fcf1dca0ec14b292db06b18891d9a497cb5b4`
`font_02_sfnt_off000109f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109F6	16256 bytes
SHA-256: `1903c227550ed3b091047cf9e056c9c2841097f4cbcf6f564d950f91ba56c15b`

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