PDF malware analysis — malicious · b6b4f3e4cc720a16

MALICIOUS

PDF

80.7 KB Created: 2021-09-09 01:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: d47c7ecfbd12efbca23cffd9ec2abc4b SHA-1: 23f9a560cd2305f00e726ed3001e6000663da0d6 SHA-256: b6b4f3e4cc720a16ba231a461783b93b386529810df1a8a8219d8be64cd34d49

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm designed to redirect users. The PDF structure and embedded content suggest it is intended to lure users to malicious sites, likely for phishing or further malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://infrive.ru/uplcv?utm_term=3d+shapes+and+examples PDF link annotation
- http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/sugigaxoniwixobenemuvi.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ae209fb14---22036587798.pdfIn PDF document text
- http://dh-cell.net/ckfinder/userfiles/files/82236642806.pdfIn PDF document text
- http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16134234bd0711---98557459841.pdfIn PDF document text
- https://taevlingar.se/images/pages/file/renetewalulimumej.pdfIn PDF document text
- http://yuanyoujie.vip/userfiles/file/25012416527.pdfIn PDF document text
- http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/79564613151.pdfIn PDF document text
- https://mgs-on-track.com/uploads/misc/files/88987224869.pdfIn PDF document text
- https://fullprotec.com/ckfinder/userfiles/files/wijajajadosazeviseso.pdfIn PDF document text
- http://inannamsao.com/uploads/files/74680281861.pdfIn PDF document text
- https://www.mnogotrop.com/ckfinder/userfiles/files/73858911958.pdfIn PDF document text
- http://harrodsrentacar.com/public_html/userfiles/file/nipevebanunewus.pdfIn PDF document text
- http://tinhdauvietnam.vn/upload/files/49848729431.pdfIn PDF document text
- http://learningkey.org/userfiles/furevolekekumavudeji.pdfIn PDF document text
- https://ptkas.com/kingkong/userfiles/files/kibafujudus.pdfIn PDF document text
- https://jamuiboe.com/webroot/upload_media/23875115107.pdfIn PDF document text
- https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/39053517276.pdfIn PDF document text
- http://amongelite.com/ci/userfiles/files/wexirekazevuxosapazoli.pdfIn PDF document text
- https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/75766116994.pdfIn PDF document text
- http://www.contal-farmer.com/uploads/files/dukapemezuteloturejab.pdfIn PDF document text
- https://ijfbacknumber.com/editor_up/99488596111.pdfIn PDF document text
- https://pannonfinanz.eu/editor_up/48815406813.pdfIn PDF document text
- https://sreekanakananda.com/ckfinder/userfiles/files/niwamijinipuvapibes.pdfIn PDF document text
- http://hosteleriayvending.com/ckfinder/userfiles/files/divudexesu.pdfIn PDF document text
- http://marthomaiticherukole.com/userfiles/file/55113793272.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_off0000d865.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD865	10424 bytes
SHA-256: `655af81c51af32a3311d44f2fae7e43ad42fe9d2906bf82ea64201f30011676b`
`font_01_sfnt_off0000efcb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFCB	17356 bytes
SHA-256: `8e7c5dbd20a91b077a64a141035b4b63c694568043dd38a14d23211aec10d4da`
`font_02_sfnt_off00011ce3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CE3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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