Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bdfdbb81cc39e5d…

MALICIOUS

PDF

33.6 KB Created: 2020-04-14 06:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 00316841c8de4dd81d86fb896cc928e7 SHA-1: 99e794d7d2d67cace93fad0a60093c5623d1be3e SHA-256: 1bdfdbb81cc39e5d2911ba008ed03c70381cb00bdbe1919b1205c218f144853a
162 Risk Score

Malware Insights

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

This PDF file is identified as a dropper by ClamAV, indicating its primary function is to deliver other malware. The document contains a large number of external links, many of which are numerically and generically named PDFs hosted on various domains, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may also instruct users to open a password-protected archive, a common method to bypass initial security scans.

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Dropper.Agent-8946154-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8946154-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://utfarmmeats.com/uploads/1/3/1/3/131378990/131378990.html#blynk+app+tutorial+pdf
    • http://laurelandhoney.com/uploads/1/3/0/7/130739525/rorudiboseregi-fiwavu.pdf
    • http://lyckhemgard.com/uploads/1/3/1/4/131406352/bulez_kikinaferaxid_dipufosar_lixuwez.pdf
    • http://newedgellc.com/uploads/1/3/0/6/130604326/legabuta-xesujususikuli-bobalagaku.pdf
    • http://tailgate4dogs.net/uploads/1/3/0/4/130435857/sukigelimo.pdf
    • http://shoe-diary.com/uploads/1/3/0/2/130272372/fuvosupilotopesun.pdf
    • http://lumbertonlandscapes.com/uploads/1/3/1/4/131437807/tutodiziku.pdf
    • http://lisabuxmanmidwifery.com/uploads/1/3/1/3/131379206/ddc1d.pdf
    • http://bmdboutique.com/uploads/1/3/0/4/130483256/vajudewoloxejulek.pdf
    • http://coshillustrates.com/uploads/1/3/1/6/131607733/gategomudusoz.pdf
    • http://storytellerguild.net/uploads/1/3/0/7/130739662/nugenugero.pdf
    • http://federicaitaliano.it/uploads/1/3/0/4/130435751/70ac004.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058cb.bin
3058648164c775340a361ae5c022c2513ee7672a5b1ee2f9735f31ea0cba89c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58CB 8412 bytes

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