PDF malware analysis — malicious · 8229d991550a396a

MALICIOUS

PDF

73.2 KB Created: 2021-09-03 22:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 6a60466c5c0bd34c963dcedbab473cd2 SHA-1: a62f37e5a90768a0fe4209611f9be20890f97933 SHA-256: 8229d991550a396a4337f6e55821e9cd2d433ca0cbb537a87c3dd4784a39dfaf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload storage and disposable hosting. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9908

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 http://www.physedu.in/newsite/userfiles/files/dumifasabukefivodadofip.pdf In PDF document text
- http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a1896013da2---3821934875.pdfIn PDF document text
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/deiqqkvri0s6m95u6h1736rnr3/48397330731.pdfIn PDF document text
- http://hidra.it/ckfinder/userfiles/files/810176674.pdfIn PDF document text
- http://sequoia60.com/clients/875776/File/53897189573.pdfIn PDF document text
- https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/fc23a81c16a04f8b1b5776891bb33193/tololagilixesaxekipi.pdfIn PDF document text
- https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce41fbf22f---xazatejuwokiwox.pdfIn PDF document text
- https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/a988feec358d3a44084b3a4ab3f7c50c/73839025034.pdfIn PDF document text
- http://yulintimber.cn/d/files/90693766880.pdfIn PDF document text
- http://etre-belle.su/images/file/wowofunisavatetepitagu.pdfIn PDF document text
- https://cafesca.org/ckfinder/userfiles/files/57140178904.pdfIn PDF document text
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/8mihh6q89090g8l8p29nrlk056/9807787270.pdfIn PDF document text
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/1vhohiestqs1b8kp4vqqfe9srg/56349990855.pdfIn PDF document text
- http://rasmesafar.net/basefile/basefiles/bafuvis.pdfIn PDF document text
- https://hasekei.jp/userfiles/file/bifajatovinadosuwap.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085d0ffea967---tijamujumakivolutuvuxixi.pdfIn PDF document text
- https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b34147f41---1308872072.pdfIn PDF document text
- https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/ab16c73652a128adc655e06b4642993c/xixunufemimenomelagiris.pdfIn PDF document text
- http://medi-sen.com/files/files/41180680073.pdfIn PDF document text
- http://francescasciortino.it/userfiles/files/relebamagetonodewilotasen.pdfIn PDF document text
- http://lafayetteconnections.com/clients/52818/File/14112887183.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ac91754d8c8---sesikem.pdfIn PDF document text
- https://acronimocostanzo.com/userfiles/file/bakovafagofubo.pdfIn PDF document text
- http://nensi.si/upload/file/21702446634.pdfIn PDF document text
- https://siroyensao.com/upload/files/zadenanodigusepufobosod.pdfIn PDF document text
- https://poolpoint.be/uploads/file/lixuravukigikadelezutiza.pdfIn PDF document text
- https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/3hb0jrqbdcspodfig80jbu2vfg/58608036185.pdfIn PDF document text
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/9nv78gi010aa9hrpqnq4g9ja5a/nafudatorimenud.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=hills+rotary+hoist+manualPDF 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_off0000bfdb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBFDB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d7f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7F2	10444 bytes
SHA-256: `2b9e855bec80f0b7a6eae8980e1c2ff15aec62f3a6d62e3912b34c95b9068297`
`font_02_sfnt_off0000ef67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF67	15692 bytes
SHA-256: `0e6dbb609dabd6c8b7bf6e0489b0ef3049a43669209312c43da8bada1313429d`

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