Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68796e4637110d3…

MALICIOUS

PDF

91.3 KB Created: 2021-09-04 23:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b4a5ba6e03fbca9f5465a7b1418f2b50 SHA-1: bb3bb23bd3d8ac1265ca06f4f054d499dad8fddb SHA-256: e68796e4637110d317e60801622401854a849d3c3670d97f034ee6354b805989
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to phishing sites or download further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://gulfsupremesa.com/ckfinder/userfiles/files/jowikajadokugobame.pdf In PDF document text
    • http://dioceseofniranam.org/userfiles/file/wasirorejerakidogosa.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160f229fa0d23d---gutafavumarogexurewisu.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/a77210dccba063388d451ad6795ecda7/gowaperav.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b269448e879---batabixevutodatoj.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/51129686220.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/ee292ba0103e6128e1021dd2b4588355/91962342075.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c976b1d21ab---wojonurefamomebug.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/a9658fecb1eb3b67239b7fbeaa5d2c32/9470490649.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/170052ba09829d87a68242d97bc0700f/26229417636.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/an767nstt5js058rerajvba4n3/65392027354.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/jekonu.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fddda847b---65161581024.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/97106916009.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/munoperomaleb.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/9274818005.pdfIn PDF document text
    • http://webursitet.org/Files/file/46389360102.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/pumifovijogekimitinegemit.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/delopixusemakarab.pdfIn PDF document text
    • http://bakerfamreunion.com/clients/1/13/13be4b03bdabdd3a133c3ee64ed6201b/File/ximizeto.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/zexorumawavitifedil.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/0dbb488638ca79593145684c9ee50582/87694003169.pdfIn PDF document text
    • http://abpaluso.com/upload/file/zubupitezejifulida.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/nasizuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=chagas+tratamento+pdfPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/20096184439.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_off0000f9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EE 19884 bytes
SHA-256: 7c776693764c7491746043aead908426a7113427fc78c8ee2f053638255b99fe
font_01_sfnt_off00012d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D57 10840 bytes
SHA-256: fcf95313a04ee81acddf666ed0175efc141c67a4f054f271e273c730bbc79aec
font_02_sfnt_off00014604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14604 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.