Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b0f337b1a81eed…

MALICIOUS

PDF

77.6 KB Created: 2021-06-30 04:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5c698efd65d59431ed5706abd33aa877 SHA-1: 69ded6e6c6ad6b7195a08f911577cb4017135ed0 SHA-256: 44b0f337b1a81eed4198146ae065c50ef58e1b32be7218221d229937d54fdf46
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farm patterns, indicating an attempt to redirect users to malicious websites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The presence of embedded URLs and link farm heuristics suggests the primary goal is to facilitate phishing or malware distribution by directing users to compromised or malicious domains.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4752

Heuristics 5

  • 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
  • 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://inwebjor.ru/uplcv?utm_term=land+of+the+lotus+eaters+odyssey PDF link annotation
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607827f52ccb9---dusulabes.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/pugasaz.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/begkuqp29ujd4febcplgk9r4i4/zulinatotepevaruwef.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/63415657467.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/3311589230.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/95329620658.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/79703219232.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4b896898b---74537418467.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/65064d1801c4b17689661facf0820803/7647704565.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/rawujigevagam.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/45664680575.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4228385a07---13464345457.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/82656aafd67fedecaee1e2f06e22f145/bipofaw.pdfIn PDF document text
    • https://serka.com/serka/upload/files/80331779795.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1cd149c52---11991366621.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/90236469802.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/13890593744.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096ae6f99940---42886482969.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/pbpns3gqrsae9oneorq878fn13/106396278.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/begekofiwagew.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210621_ED64B48C44FED7D8.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/rue2daqcjuj4hkjajariihjrsf/bozomijidasobewopakemi.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/5f9e27cd163eb9aea6c4cec31629efbc/79893551284.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10623 10532 bytes
SHA-256: 10b070ff5d4e77e5ad1b201841fdea0ea53f7a46ee40c1ef4db795e4fd97de9b

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