Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcccf41a1b0fb770…

MALICIOUS

PDF

108.2 KB Created: 2021-07-22 04:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b767da411587d788d14fe71030cc45b6 SHA-1: 5422db3c61e3a540cd1657accbc32262bb82c3fc SHA-256: dcccf41a1b0fb770069eeb9a7d81b81266c5d691fccef859e4e7b82ba1baac1b
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting. This indicates a likely attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.2222

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 http://igorodstore.ru/files/userfiles/files/82412708111.pdf In PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1322b3ae83---42135086812.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddfc302bdfc---1204516992.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/547eeb3770148f512000c56d95c6c5fa/winixubitesarakosipefe.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/45572594970.pdfIn PDF document text
    • https://thietbidienmanhcuong.com/upload/files/gitubevulovofexosetuza.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/vegazaxukejazuxiwufekuseg.pdfIn PDF document text
    • http://splogservice.ru/content/file/83811705980.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/4bfb631e8b4f4420880a4a586a3aa1d6/6036232788.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/g59m3a688p4hvo1jrga6i9rl5b/bojuvowijazuxizufoxapu.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160de1b56b6a3c---vozupeveseketerizu.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/jetusasofejomuralu.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609a55a0e8f92---58882618928.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095a6021189b---roverelonamite.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/mtesj5b6s035e1913oh1urrgic/zolirajudalanukajezo.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/bafuwenawuxesemo.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/renojilidakukesugus.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c712fc2e101---66973671167.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/41736351136.pdfIn PDF document text
    • http://phanbonvbm.com/upload/files/goxoxopim.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/25717c7466383f9a302340d81caa254b/97033973003.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/2r807rtvh8098inmqrisv37553/pemadilopabafino.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/6a5ff7dba4739941a67850158d59f52d/givupebexafi.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/39075184513.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+many+pokemon+are+in+a+deckPDF link annotation
    • 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_off00015f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F40 16132 bytes
SHA-256: 5ed5f7b4e54a8e54593e9857ed632607cca6829b916c78713fca3fce1e49ee09
font_01_sfnt_off000188df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1