Malicious PDF — malware analysis report

Static analysis result for SHA-256 0044ec42ad11eff5…

MALICIOUS

PDF

85.5 KB Created: 2021-07-09 12:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d0d75d6b50939172cdabce02cbb64bb3 SHA-1: 6554156a9d580b0d2cabdaa7a2e15e96dcf48756 SHA-256: 0044ec42ad11eff54fbc3158a05e7310a2d3e9e64cf8cf5a32be4d6ede4065b8
174 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to compromised WordPress sites or raw IP addresses, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The presence of multiple link farms and disposable hosting suggests an effort to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7437

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://fonnepal.org/userfiles/file/14511777329.pdf In PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210706194505.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/92ec7b33508caa015638f48f765bc10d/kunixenekizokaxapupu.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c0403230dc4---kavuzizidilejusawub.pdfPDF link annotation
    • https://sportsht.com/userfiles/file/59364947350.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/51240660390.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d91613df6---wafofobumidofitokixok.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/bagajolirazavefeboxapaje.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/f9t2hcdjulkotegl8vh04agvu7/bilupuzevozamosimugosax.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/vetixodupafovasiza.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/82485521845.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078cd141368f---xirobavigij.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/c3bf165e40abf4f5067a7c279dd96913/57876148849.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607bca059b0f0---34170381187.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/35332204943.pdfIn PDF document text
    • https://serka.com/serka/upload/files/zuwiwiluxaxadinode.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608112059e3e5---99129275232.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/5ce85idg4ja6orspdk2iik1p52/89377695335.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/djbbohvsarnnjm6k6l9v4bg3o2/nakepagijivomawemejosu.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909a7542735---63571493814.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/fugonepuzagomobarexuvexes.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607aafd03f2c1---zasavivude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=average+corporate+lawyer+salaryPDF 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_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 16120 bytes
SHA-256: 5cfa37fce0989fcd98349beccf9a63719aff29e66b00f3ba655f54b68a91f5d5
font_01_sfnt_off00010346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10346 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B58 17432 bytes
SHA-256: 7b0e1b2aa3f9c7426ad00329671f42089719b7908730552a76237cc5d8bafee8