PDF malware analysis — malicious · 3f4580c77ab584ef

MALICIOUS

PDF

82.3 KB Created: 2021-10-06 23:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 02fc1adb9aa64bcf4f9b0a23e178d097 SHA-1: f0ca851dec4e9ecff9df1356a6b758a820244a95 SHA-256: 3f4580c77ab584ef5ab104e173aef4c6a20cb0d788ba3c6cfabeca418fb86096

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and numerous external URIs. The PDF structure suggests it acts as a link farm, directing users to various external sites, likely for phishing or to download further malicious content. The presence of embedded JavaScript points to its use in exploiting PDF vulnerabilities or delivering malicious code.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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=how+do+you+cut+your+hair+in+ark PDF link annotation
- https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/2f7d8299f31d824c475bd06fc0f091d7/lelusut.pdfIn PDF document text
- http://tufaghanafc.com/js/ckfinder/userfiles/files/40294841686.pdfIn PDF document text
- http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/tivagaparawawufevi.pdfIn PDF document text
- http://glassick.com/userfiles/file/85867298657.pdfIn PDF document text
- http://printrun.nl/userfiles/files/noludubosirojozusika.pdfIn PDF document text
- https://www.fangjin.org/ckfinder/userfiles/files/balelubemonuvu.pdfIn PDF document text
- http://watchimport.eu/userfiles/file/gapajotodofiv.pdfIn PDF document text
- http://systempro.kr/userData/board/file/lebelobud.pdfIn PDF document text
- http://kite-surf.sk/files/49969532659.pdfIn PDF document text
- http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/numokizetupevowo.pdfIn PDF document text
- http://kompassztuki.pl/Image/files/13499989323.pdfIn PDF document text
- https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/ea0675f1e5ae6f2d444d147caa9a3629/janadulixibusugomeno.pdfIn PDF document text
- http://happinessgown.com/upload/users/files/44021472674.pdfIn PDF document text
- http://petraifevronii.ru/ckfinder/userfiles/files/21885550135.pdfIn PDF document text
- http://vigova.com/Images_upload/files/vajupuvifusoxutogub.pdfIn PDF document text
- https://gbp.dropship-online.com/userfiles/files/53874007397.pdfIn PDF document text
- http://gpkoaee.ru/ckfinder/userfiles/files/tupeguwisinonusatobupeket.pdfIn PDF document text
- http://helderlive.nl/ckfinder/userfiles/files/22918573532.pdfIn PDF document text
- https://hotelexpert.ro/uploads/files/38714219110.pdfIn PDF document text
- http://rapet.hu/files/leburizufevog.pdfIn PDF document text
- http://carzip.biz/files/uploads/files/23496198834.pdfIn PDF document text
- https://sherwoodchamber.org/ckfinder/userfiles/files/12624764336.pdfIn PDF document text
- http://101-games.ru/images/uploads/files/60529902477.pdfIn PDF document text
- https://dacola.com/upload/files/fapudidupefidezajot.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_off0000d814.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD814	10504 bytes
SHA-256: `522d0c816f70c7ac7afbc92cf04f37da936befb898d6d6eef492d4f6fec5a284`
`font_01_sfnt_off0000efee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFEE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010800.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10800	19616 bytes
SHA-256: `f8f3dc540b645fe0928c2619b39f686301be1716e584b21d2312eb034af5c9b9`

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