PDF malware analysis — malicious · b2f118a7f8821810

MALICIOUS

PDF

81.7 KB Created: 2021-09-20 00:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: fa2b096399f1f368d22d46f2f8db9ff2 SHA-1: f6918cba6b93efcdd654a3f4155e3772e7a8157a SHA-256: b2f118a7f8821810da4f571b063e23f28032a52c3cdc1e9595b66a079f186bd8

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are used in a link farm configuration. ClamAV and ML classifiers identified this PDF as malicious, specifically as a phishing or trojan delivery mechanism. The presence of external URIs and the link farm structure strongly suggest an attempt to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://cructi.ru/uplcv?utm_term=pokemon+red+and+blue+version+download PDF link annotation
- http://2016.letnifestiwal.pl/ckfinder/userfiles/files/fanikufemarerixivaxo.pdfIn PDF document text
- http://standdominica.org/files/files/debarejakivus.pdfIn PDF document text
- http://tokyosushilohaus.com/uploads/files/58430667558.pdfIn PDF document text
- http://www.hz-kontejnery.cz/ckfinder/userfiles/files/rivasofidowe.pdfIn PDF document text
- http://ubestsports.com/imager/files/20210902165802.pdfIn PDF document text
- http://abovomedia.hu/_user/file/povumafabudid.pdfIn PDF document text
- https://navliecky.net/userfiles/file/fujunadukosifiganilax.pdfIn PDF document text
- http://aasghsflqsae.handylover.com/upload/files/kuworimobexefax.pdfIn PDF document text
- https://netiko.ge/img/Data/file/11262067642.pdfIn PDF document text
- https://globalcareerclub.com/FCKeditor/userfiles/file/pewukeruxo.pdfIn PDF document text
- http://kleinschadenexpert.com/userfiles/file/15198010614.pdfIn PDF document text
- http://kleinschaden.expert/userfiles/file/monotedinisoded.pdfIn PDF document text
- https://ijp2.com/contents/files/nujazufolubekuj.pdfIn PDF document text
- http://sacoorhealth.pt/site/upload/file/31714781451.pdfIn PDF document text
- https://mariapolis.es/ckfinder/userfiles/files/29307232194.pdfIn PDF document text
- https://dienhoanghean.com/upload/ck/files/sijasini.pdfIn PDF document text
- http://suliaox.com/v15/Upload/file/2021912720171385.pdfIn PDF document text
- http://mikailang.com/userfiles/file/20210920050042_360245656.pdfIn PDF document text
- https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/21b647b872db0bdc242a23eb59322893/55156849202.pdfIn PDF document text
- https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/diremitevedegu.pdfIn PDF document text
- https://www.disbel.es/ckfinder/userfiles/files/95486040537.pdfIn PDF document text
- http://tabletopad.com/images/file/raxatijagajunanaxixonelej.pdfIn PDF document text
- http://tevukasveza.lt/ckfinder/userfiles/files/lunalovifawunirov.pdfIn PDF document text
- https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/99fd30cb68f43ee00b68ea05fdae04bd/redozepasikusuvobi.pdfIn PDF document text
- http://innotack.com/userfiles/files/93391733743.pdfIn PDF document text
- http://indigobaby.eu/upload/files/76412327103.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_off0000d85c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD85C	18344 bytes
SHA-256: `38ba05587806b008431837b6ce4de18ed0c298805c86e6c89b6c5138e2a24d11`
`font_01_sfnt_off000107d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107D6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011fed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FED	10796 bytes
SHA-256: `7ab13bef39689480c62ec725fc73ec31104223dd132e281dd1e39a5eeda33bcb`

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