Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a08b5983fc83757…

MALICIOUS

PDF

78.1 KB Created: 2021-10-09 05:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ddbef39bb6819ec45d6e371227638e49 SHA-1: 13263da6ddc0aff94ee011ad7dc1dfc8d2bffaa6 SHA-256: 8a08b5983fc83757062f2d3f1b0ba6f12428dedf248f24433a514450d7963656
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many of which point to compromised WordPress sites. This suggests the document is designed as a link farm to distribute malicious content or facilitate phishing attacks. The presence of embedded JavaScript, while not fully analyzed due to obfuscation, further supports the malicious intent by potentially executing further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8173

Heuristics 6

  • 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
  • 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://daiduongmetal.com/uploads/ckfinder/files/54500009798.pdf In PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/fd719c7ab0e1254911d45d243c960a80/80513775903.pdfIn PDF document text
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/laseragevoti.pdfIn PDF document text
    • https://rsvforum.com/userfiles/file/53516446818.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202109121424202396.pdfIn PDF document text
    • https://preciseenergygroup.com/media/24860071313.pdfIn PDF document text
    • http://nataliashishkina.com/userfiles/file/nidezujugedizum.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161351ae5bece8---41615195470.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/66920326759.pdfIn PDF document text
    • https://booknowrentalimo.ch/userfiles/files/10354844350.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/jepobojuvalogaxesopa.pdfIn PDF document text
    • http://motopujcovnateplice.cz/userfiles/file/labig.pdfIn PDF document text
    • http://odra.cycling-recycling.eu/imgturysta/files/pilasibelivo.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/18008053646.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f655592bf8---zizeberedoveviv.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/67107975384.pdfIn PDF document text
    • http://savemaxint.com/files/file/4508360105.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/tagozexobabiromarizepo.pdfIn PDF document text
    • https://lhorizon.ca/uploadHorizon/file/76162125342.pdfIn PDF document text
    • http://nhadep30giay.com/uploads/image/files/36587243493.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/bopojoputezose.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/94c6e281ad6a267e75c60e21fdb5e267/vuvasonigedatif.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/161584e4ad76a8---72884104000.pdfIn PDF document text
    • http://firegallery.ru/img/upload/82069640668.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=i+got+lost+in+the+netherPDF 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_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 18536 bytes
SHA-256: c36b3a1468ec773dd9258997368c63357b82e3414475b32a0ad4c9bc13d8d35f
font_01_sfnt_off00012040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12040 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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