Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac5b0cbe542f9f6…

MALICIOUS

PDF

87.4 KB Created: 2021-07-03 18:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: bd5289bad81ad7e903217f49eb9d42bb SHA-1: 00bfbf7f5675330f3550dbb58ccd9189e46bad5c SHA-256: eac5b0cbe542f9f67d0f22b241b598b017ae45cf8220449fedc299cc98d72b32
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features numerous external links, many hosted on compromised WordPress sites, suggesting a phishing or content-luring campaign. ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier clean score 0.2214

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609724f596178---66601457219.pdf In PDF document text
    • https://actorconseil.com/files/file/wufujakebulo.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160861f4c4eca8---tofoxarusodoparam.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/gstuotouqt81q5l4ne7hu8va32/vusuponuradulujut.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/eatgoqnt5iu5s254vuo57r29j0/58445067064.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/80976229208.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/dadebosijubisuwir.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083b0da3a416---99040707628.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/dpm72ud9ed7e3lkj4fmn0e6im7/biwevowor.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/kqprnmjm8hhe8b62u7jqm20v5s/59710714573.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/rudaxasalu.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/94463450958.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160afdf12226a1---judeposifuworopetamite.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/bimozatezizunune.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/388fc63b1b9bd02f788e9bc3bf427830/21108124498.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/vekite.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b7750fba4b0---15724302333.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d005673aa5---zasilapidimepunizap.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/koliwenes.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/gurufusujezinijet.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/62466850245.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/dexatinajegefa.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/qd0s729si9n605rn1ps4qvgtp4/52144097662.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/p2ogvqgv1nba69j282kf96c1nh/84089172584.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/8bbd617c0738d0f46f0fe2327b855974/jekepabukikanituvapev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+undilate+your+eyes+from+drugsPDF link annotation
    • 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_off00010018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10018 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001182f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182F 10988 bytes
SHA-256: ec636ef9b020ed1ecc71422986dc8c6bc41a7ccda393ac3c23a56cb67fa5d0b8
font_02_sfnt_off00013186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13186 16840 bytes
SHA-256: 95604b58a6265ac3faedfd991db69c2398d54def64f88e965d4a7337ace29285

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