PDF malware analysis — malicious · 98d415a4e8bcfbdf

MALICIOUS

PDF

82.5 KB Created: 2021-08-08 09:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 51178b29adf77bf3f2b2b21b1d349f26 SHA-1: 688a40a374de8d71b31cd32a112bc66a788a4a79 SHA-256: 98d415a4e8bcfbdf49dea108602d9dbd66777a00900a64279b95f5b939cb56d4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or redirection scheme. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=ionic+equations+worksheet+answers PDF link annotation
- https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a263dc681c9---gazafukemujugud.pdfIn PDF document text
- https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16075c412620e6---nipiwuvib.pdfIn PDF document text
- http://chiangmai-clean.com/user_img/files/94262812508.pdfIn PDF document text
- https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/949e4876b2f237b24e00cf3984da7730/menazepesuxisodapu.pdfIn PDF document text
- https://doellefjelde-mussemarked.dk/images/newsmail/file/jowusudib.pdfIn PDF document text
- https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/98f4719e71804e68925338d5839e38c4/71400089995.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c217728637---90222121096.pdfIn PDF document text
- https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/482b30cf5a1764b1ef450d8ec62fcc1b/17549315825.pdfIn PDF document text
- https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/4448f7ec2e71ea85163a8eec6058f363/38833341287.pdfIn PDF document text
- https://daxitrip.com/basefile/daxitripcom/files/14425632155.pdfIn PDF document text
- http://zonweringbelgie.com/ckfinder/userfiles/files/4232113289.pdfIn PDF document text
- https://ibextrail.com/editor-images/70606593260.pdfIn PDF document text
- http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f13b2436c50---xusokagifugi.pdfIn PDF document text
- http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98fabb3c44---93072180770.pdfIn PDF document text
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a52e12d04b0---dimemumugudonas.pdfIn PDF document text
- http://childconnect.com/swi/fckfiles//file/nibozikagewipesex.pdfIn PDF document text
- https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/4b4a6ec949a1020645ad8c43dda39e30/39399667149.pdfIn PDF document text
- http://maschimaurizio.it/userfiles/files/48029261519.pdfIn PDF document text
- https://ivaco.it/file/nenesezokusitiguteduvela.pdfIn PDF document text
- http://28777886.com/Lpf/UPFILE/userfiles/files/92027017543.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/40c8f2b0435a94145095ef76fee567b7/govapunu.pdfIn PDF document text
- http://indago-rovigo.it/userfiles/files/vajab.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d48f89a078---dafuturoduxamupu.pdfIn PDF document text
- https://projetounificado.com/uploads/files/tepurokamubunasijivofo.pdfIn PDF document text
- http://icltindia.in/userfiles/file/40433363673.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_off0000e03b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE03B	16680 bytes
SHA-256: `a4c7771d41a529ca3dc53c6bd3f52b4bbf54fe9847fd1a2efead2b88ceea91b9`
`font_01_sfnt_off00010baf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BAF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000123c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123C6	10656 bytes
SHA-256: `e1d7da14ed8a723557ef775a87e9cf86bffdaf7282e540c9a5a695470d051361`

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