Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed38798cd332c4c5…

MALICIOUS

PDF

72.0 KB Created: 2021-09-28 03:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 352da1754ccde864910c081f88d5621f SHA-1: 17af781d8915b24067c8134bfc3db465eaf9bbdd SHA-256: ed38798cd332c4c51576a3935c026ecd80afcb69ccdc2f62c141ae3ad5757814
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded JavaScript stream and numerous URLs, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution lure. The embedded JavaScript likely facilitates the redirection or download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • 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=download+mxit+apk PDF link annotation
    • https://megalightgroup.lv/uploads/files/28171094939.pdfIn PDF document text
    • http://soles2walk.cz/data/file/93043262469.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/34be15b8db049c4ed08da2005186fc9f/89342298801.pdfIn PDF document text
    • https://guruvinodji.com/Userfiles/file/bukupege.pdfIn PDF document text
    • http://tacchigroup.com/public/thread/risorse/file/68869700122.pdfIn PDF document text
    • http://songchanraccomposite.com/upload/files/kasenejufilotar.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/d5c7b9a79a20ed1aec15c12c8b99eee7/bamego.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/71810092444.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/96226096555.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/zanalasafubix.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ef4c7bd932---kabimurakemedanibimef.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/9349488496.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e66975abe6---kididof.pdfIn PDF document text
    • https://nezamirekhaseafoods.com/userfiles/file/zagakalogazu.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/bokirogos.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/20178689260.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/bufojuruvugiwiwidafuli.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/27707535955.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/vowawimudelino.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/58441781100.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/nigidisenexobofa.pdfIn PDF document text
    • https://citrasas.com/ckfinder/userfiles/files/farozinisodejipo.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/23773623491.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/malutovitibu.pdfIn PDF document text
    • http://word.mn/uploads/assets/15702677589.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.

FilenameKindSourceSize
font_00_sfnt_off0000b67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB67F 10432 bytes
SHA-256: aaacc16000b8755c1949d9da2a56ec3f56238afafeb4117403e308f474b5a36b
font_01_sfnt_off0000ce1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1D 17096 bytes
SHA-256: 3ac638735cf7c32bd625afd2067a61cd51be2114baee7500ba28f619db166384
font_02_sfnt_off0000fa11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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