Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80c69c5b2bd9c67…

MALICIOUS

PDF

84.9 KB Created: 2021-09-01 16:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 132c1c6694f8f183081acbe162fd1d3b SHA-1: 86f47b2152c54b1bb58d525bd08c5efe3b2c74d1 SHA-256: b80c69c5b2bd9c676d986cce6328d4ee045ecd79aa689a796b2fc1b11b91d6f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories. These links are likely intended to lead users to phishing sites or further malware downloads. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true malicious intent.

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://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/3205635f6d0da11074263550095964be/56419150204.pdf In PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb14d52f10a---gazokomazezixelujoxa.pdfIn PDF document text
    • http://mestan.by/images/file/28445612367.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/xoferovowojujafapidemaj.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/8kb4ghq1j555gfhj8tnqt6be4u/rofitalozufotasiwowe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2b033f0e8---76207311717.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/6f2379b5d5ac80e522c5da46461af495/votusivedabaxav.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/wibemakusunubiveri.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c248c829fcb---15300469034.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/47fd793e476e03fd7cddba12bda1eca1/79278784784.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/46986720195.pdfIn PDF document text
    • http://hagelkonzept.com/userfiles/file/60304384539.pdfIn PDF document text
    • http://sb-78.ru/files/file/vukajovisonisapivep.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/7747758645.pdfIn PDF document text
    • http://turatabor.hu/media/80469651980.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/65092315030.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6b3dd9411---fosumusisujexigu.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/71383496665.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8843387ddb---66676731836.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/97848928405.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/56737382945.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/29378660282.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/560f2f2dd957c26c4169ba36fb61f518/kojafusedumelesipetoj.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af5a5aefd48---88512423758.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e6c455857---32045768523.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ba9617516---pugoporatitagamijo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=anaphylactic+reaction+drugsPDF 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_off0000e76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF84 10988 bytes
SHA-256: b6612be03f1edca6cb67b90d928aab907f17a0d3c0c7555d034a64a3696ba63f
font_02_sfnt_off000118cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CD 16940 bytes
SHA-256: 87221593e41c28c2b4863eda36557da623840b9dba8e1eede880bcd65c509729

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