Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc4862f039d9351…

MALICIOUS

PDF

88.5 KB Created: 2021-06-27 13:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7962d9916d1f1dbb2b54410759923b46 SHA-1: 3284c563eb05fba48de395e798e6329317b97584 SHA-256: 7cc4862f039d93512e8ab4e535af6917b72499db66eb665be79b4ebd9d7fa22a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://huntic.ru/uplcv?utm_term=landforms+of+the+world+class+4+ppt
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985270b12b0---21296487507.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072078ea8804---22610498739.pdf
    • http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/deboduvorom.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad5348fd79---selofogaz.pdf
    • http://aybar-gallery.com/userfiles/files/75889870755.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/5020l42mf2v8ps9tasm6uiauib/11033616446.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/8ce1cfcb95013c824bbe98b8c873cd9f/mapewenubesasukixevixog.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/bc56dee96eefab8f9232e9baa48da59b/febowekopomoda.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/k4njgcvhpg4lfcee927kir623h/domerarizejej.pdf
    • https://manualismedicina.hu/fileok/file/gusisazaxilexak.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096621b43822---dunivep.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160d01314cbe32---ponadibasatikirud.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/35b77c3e5979e646166fa5d13a038ccc/jidavimanosefirof.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/k04hh9a00q1om2riesogpntcj4/fereg.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609306b1120d2---gizikedazan.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf0e6aaacc---48537983884.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/hlp2ba2iqpc20ntcb2ear808h6/63801725342.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/2a23e9789b18eb3cf20949c6db07617d/26926174211.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/7c375fb29214e191d99722d6bb6635ca/kabat.pdf
    • http://cdwy028.com/uploadfile/file/20210621051411.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/nkgt3tlasmo6i1kpnl34j3i4ed/68140096730.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/s1j86rhgn55go15ilpbd7egap5/gipajaxew.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f496723ae6---26836197527.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a35824dfd5---garoj.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/25121d2768c9c2240cb048e16ec7eb77/71761665635.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f665.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF665 16792 bytes
font_01_sfnt_off00010e77.bin
137feed8513443d936fa69681923870e8355453fad7120075d53acdcfa7b5d73
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E77 17132 bytes
font_02_sfnt_off00013b23.bin
47fbc49ebba6ed2634d265cdf9b39de8f984ed8f3d16186f16b8377075077d2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B23 10912 bytes