Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66dbfd4c65a62cd…

MALICIOUS

PDF

74.6 KB Created: 2021-09-10 02:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a28291d6864faa6b61be54fe1e755786 SHA-1: 727b29d134bdb35e07309971f73db3cf51a2befc SHA-256: d66dbfd4c65a62cd577253af0a0a2b6b767bb3685efaaaf1a02a0acce73d026e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious actions within documents. It also contains numerous URLs, many of which point to link farms hosted on disposable domains, suggesting a phishing or scam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://aotwresort.net/ckfinder/userfiles/files/wikanajaregamurapufuvuke.pdf In PDF document text
    • https://aitalk.vn/upload/files/tawasipogeduxozi.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/63794318956.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/bokof.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/5827965075.pdfIn PDF document text
    • http://secoinblock.com/upload/files/gamukitekuno.pdfIn PDF document text
    • https://fivetc.net/uploads/files/65109976770.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132efbf11b7c---mumap.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///fuvepopanogizoz.pdfIn PDF document text
    • http://4chan.ro/UserFiles/file/kelixojodagulajoridijimep.pdfIn PDF document text
    • http://dinobajka.pl/Upload/file/gepogawovimu.pdfIn PDF document text
    • http://saimiri.name/upload/file/54280140818.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/tiduzi.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/12496971930.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/sibixe.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/dubekimipizi.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/75284087183.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/34693101376.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/nuzadepimoma.pdfIn PDF document text
    • http://upnbkk.com/file_media/file_image/file/76747012725.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/88930258144.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/48904418643.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/79067579216.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/vifizisuduno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=what+is+topology+explain+different+types+of+topologyPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000c0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DA 10984 bytes
SHA-256: 2dea293082549dac036f677364801c898df6f21dbfb8fcbcbb76e6cb5db4653d
font_01_sfnt_off0000da25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA25 16440 bytes
SHA-256: 4962804b17eb0b1dd1f497bc2647e0724ef4e40c4e54982fa7a6adfdf2aedd67
font_02_sfnt_off000103f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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