PDF malware analysis — malicious · e120f16ad96f23b7

MALICIOUS

PDF

70.2 KB Created: 2021-10-01 18:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 76fd6274b4c93e23f5a28e6e0bbe573a SHA-1: 7334fb09edafdf3bd87c74ceeb514dd466f47054 SHA-256: e120f16ad96f23b76255cd8190210ee9dfd69b9c6d31ec10993571a3dacf66fa

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and numerous external URLs. The presence of embedded JS suggests an attempt to execute malicious code, likely to download further payloads from the listed URLs. The PDF's structure and the high number of disposable links point towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://pixomot.ru/uplcv?utm_term=gta+vice+city+obb+download+for+android+free+apkpure PDF link annotation
- http://www.pics4us.de/userfiles/file/fufapumirumafebakuzuluf.pdfIn PDF document text
- https://reviewz.eu/app/webroot/files/userfiles/files/73602352899.pdfIn PDF document text
- http://azizolace.cz/images/file/42786569219.pdfIn PDF document text
- http://wildpflanzen-planung.de/file/lamivefikasozutawudumoxe.pdfIn PDF document text
- http://pospatrans.cz/UserFiles/File/jefagexiti.pdfIn PDF document text
- https://proetcontra.hu/userfiles/file/kuwawawikasa.pdfIn PDF document text
- http://mtsp.by/userfiles/files/31216772158.pdfIn PDF document text
- https://vaynhanh365.net/contents/files/41807035328.pdfIn PDF document text
- https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/92055894913.pdfIn PDF document text
- https://dollarplus98.com/images/upload/files/fapokodusuvanaximawewone.pdfIn PDF document text
- http://makinsushi.com/uploads/files/37482007399.pdfIn PDF document text
- https://safarekhoob.ir/basefile/safarekhoobir/files/ferubusewexumese.pdfIn PDF document text
- http://yas-center.ru/userfiles/file/dufivoxusazij.pdfIn PDF document text
- http://urduhadith.org/survey/userfiles/files/fatovagodimure.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149ae2bed758---83794992554.pdfIn PDF document text
- https://netcsemege.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/64538141135.pdfIn PDF document text
- https://tierlistei.ch/downloads/wotalogizuboxaweroz.pdfIn PDF document text
- http://inbjnews.com/data/cheditor/0603/files/pukabex.pdfIn PDF document text
- http://imailbox.nl/images/uploadedimages/file/jelomuvid.pdfIn PDF document text
- https://samuelben-horin.com/userfiles/file/mutatewajiganuzuwanazo.pdfIn PDF document text
- http://offerseir.com/basefile/offerseircom/files/82939339762.pdfIn PDF document text
- http://darstin.com/userfiles/files/23981448574.pdfIn PDF document text
- http://czernavendeghaz.hu/admin1/file/59284171526.pdfIn PDF document text
- http://eldmsh1.ru/js/ckfinder/userfiles/files/72514460752.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_off0000b262.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB262	14960 bytes
SHA-256: `803e0464b9e95f25d8b577bf051a1cf0df5dad4a14614a6917a0367f8180ccfe`
`font_01_sfnt_off0000d8bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8BB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f0d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0D2	11080 bytes
SHA-256: `48c88587b4e616521ae6c55f863719848e3e6f2523ffd438dc36f0d72ad4941a`

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