Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd50e94dd7131d69…

MALICIOUS

PDF

88.4 KB Created: 2021-08-19 16:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 10f947a6331d0137cee6bcae2fa94e7c SHA-1: 88ddff3e932c3e82a302a8ce593d37059afef23a SHA-256: bd50e94dd7131d69648166d00a5b7344f67690db290f95ee87b2c80631f12fff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress upload directories and other domains, suggesting an attempt to distribute malicious content or conduct phishing. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware delivery lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 6

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=cheats+for+gta+san+andreas+xbox+one PDF link annotation
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f361a5bc584---2678924644.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/11763512057.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/d3018aa47b1e7c0a0639a1c3242edefb/gozikaxumajodajerexatuva.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/59926088699.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/dojerowodoke.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/tomalaximakidajol.pdfIn PDF document text
    • http://xn----7sbabjkhbzbqti4a3apfmdd2s4b.xn--p1ai/ckfinder/userfiles/files/97130488325.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/64636458947.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/tixowibogurufonamafasaf.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/25740149909.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/89485dd728b93fe606a21309b47af5ec/99829968940.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e075d88c0e---depojisumefusifojuminake.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16094be424b068---55095839829.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/zunemupamixi.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/k1t5qto053avdj1k61q72t1jg4/mukadabit.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/zasugijetisagalewuzege.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/85049554731.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/97936802075.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/a0d7441179b1c678bc27b45988989784/sebajexixinifi.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/56229516068.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608367f26e1ff---62536723070.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/c4afed19d8d95a0d568e30f13e68482e/zexukagap.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117831d74a42---lezilopewiruluxasarub.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/wutuvomemutunoluboxal.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/bomumivuzu.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/37e5ff13c8de2eaf547fd566be218e38/xapitorafobawujik.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_off0000f2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E9 10768 bytes
SHA-256: eb3e6903518f26592dbf78fc573b367fdc961a24e07399bed6abca8c887c2ee8
font_01_sfnt_off00010b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B80 17692 bytes
SHA-256: fd4df7d9e525f2e11d3eec4b2c85d79d616ae1666027263bc383ae9e90fd66ba
font_02_sfnt_off00013959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13959 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1