Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56069f0b2210d3e…

MALICIOUS

PDF

80.9 KB Created: 2021-09-08 13:36:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bbf72d2e1e7dff5241c6f3c695590b72 SHA-1: b3b72dbc971286eb410eb5f2af91b6d9166ace1a SHA-256: f56069f0b2210d3e0283505709b3ce71a5eb1027bb9b5f5a15e7bcecbbd6691c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://wastran.ru/uplcv?utm_term=principal+interview+questions+with+answers+pdf PDF link annotation
    • http://er-trans.com/img/produkty/files/zaniwelizevanajede.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/dojezolalegifekafofa.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16130ec4d06219---72720686400.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/6904473491.pdfIn PDF document text
    • https://bharatceramics.in/ckfinder/userfiles/files/gasozoxokavodoxaketemoru.pdfIn PDF document text
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/88160797260.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a977c42d7---vigetuvixazudidujodowanu.pdfIn PDF document text
    • https://www.orthovision-lublin.pl/ckfinder/userfiles/files/gipuxel.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/14473550472.pdfIn PDF document text
    • http://metrominicabs.com/survey/userfiles/files/71363084875.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321a4ad391e---lunarebasabe.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/75035126428.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/jedalitazuxevitovedago.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/12589907103.pdfIn PDF document text
    • http://bbbo.handyfriendship.com/upload/files/zivovorural.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/28955719365.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/65542274721.pdfIn PDF document text
    • http://linza-market.ru/upload/files/7602094162.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/lakevupek.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/wajavovabebelogolisisobis.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb472dd012---benilumulivuvolezuguruna.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/dukapajelujis.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_off0000d718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD718 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2A 17452 bytes
SHA-256: 126417818fd9690bbf5a98d4c713e9ee5ce92980ccb2a94e25e6667fb7681a40
font_02_sfnt_off00011c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C45 11116 bytes
SHA-256: 3ccd779623d4eadec2b56fa81012297c3763863715cb204b4b5d1675a12bf83c

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