Malicious PDF — malware analysis report

Static analysis result for SHA-256 c292b189002d0e60…

MALICIOUS

PDF

87.4 KB Created: 2021-09-05 11:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0ecf64b57c54e26ebc830f7439c0e686 SHA-1: d9abf47e7303b854d8ac36695ef7a1f5b7706a5e SHA-256: c292b189002d0e60d6d05f7cd2bd35b88fcf83a5084fd2df7588d2d2ee392015
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The sample also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised WordPress sites, suggesting an attempt to redirect users to malicious content. ClamAV and ML classifiers strongly indicate maliciousness, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e4dac92f89e---55940762959.pdf In PDF document text
    • https://danielfelber.ch/userfiles/file/53786863360.pdfIn PDF document text
    • http://garankuccu.com/upload/fckimagesfile/185aae3348588f62f638ceedefd73166.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/72472624935.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098db6877565---47941772768.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb2ec54035---lukipekinomikabexomu.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607f72ce5aa9c---gubomazulug.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac7d7f378---tinukituwokafo.pdfIn PDF document text
    • http://bienbao.net/uploads/files/burapav.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/gamorovepuvaw.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/wesexajavozipumebi.pdfIn PDF document text
    • https://menu2uplus.com/images/file/bagoveripemutubiz.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/porivinuwetiwaropep.pdfIn PDF document text
    • http://www.siposferenc.hu/html/35779991915.pdfIn PDF document text
    • http://rideco.hu/upload/file/merigedefepomonutejolof.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/fulinusule.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/barezobagewusomuvunuwovaj.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/002f7d1ca8332bfaa74b68c51418a6c4/84730335161.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa229ac786a---fezuridefogotekijagusivi.pdfIn PDF document text
    • http://mega.kz/media/upload/files/gidumurigesivekejiwijuw.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/59855730031.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/2208284fb7993c52c6075a72737e8a51/zinamu.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/fuwezebalu.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/tokadisufetijatuwax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=s2000+service+manual+free+pdfPDF link annotation
    • 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_off0000ecd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E5 18984 bytes
SHA-256: b6137f995991b1023e1565fb26d9ba616e8a09bae8942c3c9b3aa0565336978d
font_02_sfnt_off000135fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FA 11044 bytes
SHA-256: 8f2823fc4576e039da9794a02a6ea502cb7d36715d4ca1dca107b59cb900139d

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