Malicious PDF — malware analysis report

Static analysis result for SHA-256 f104e4fa4dd692c1…

MALICIOUS

PDF

43.9 KB Authoring application: PDFBox
MD5: 27721dd2a4fa5506f0d40e0f84cb80da SHA-1: 5c4da73d27afeb6684fc69f09ac9058194edaacc SHA-256: f104e4fa4dd692c1cdad8ff424831aee767ff6ce89e4eb66e8163f8956e4d372
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1059.001 PowerShell

The PDF contains a large number of external links, identified as a link farm, directing users to various suspicious domains. ClamAV detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', indicating a phishing or traffic redirection scheme. The embedded URLs are likely used to download further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://xeseparo.orlandofelixphotography.com/uploads/2020/01/27/e73473d.pdf
    • http://mnzdrv-biotic.ru/uploads/2020/01/27/23a36602.pdf
    • http://febaropin.eccex.fun/uploads/2020/01/27/7fe431316c.pdf
    • http://poje.sdekor.ru/uploads/2020/01/27/7860964.pdf
    • http://guropas.lbsteam.com/uploads/2020/01/27/belerutij_vigipegufonoza_vonatodateto_dorivulux.pdf
    • http://xirezomo.kupim24.com/uploads/2020/01/27/143a427477b9.pdf
    • http://xipepeto.ssl-test-nic-2.ru/uploads/2020/01/28/kidoxemezi-kisivu-xitenisul.pdf
    • http://veronicaasorey.com/uploads/2020/01/28/5367351.pdf
    • https://rafilaluxonijew.weebly.com/uploads/1/3/0/4/130476150/130476150.html#acme+screw+pitch+gauge

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011b1.bin
8cdfded75aa807315c89caad715c29b273e07a02385c4dd32c27cf6bf820fd3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1 8540 bytes
font_01_sfnt_off0000513e.bin
094359120818baad251b372eb0b1a3904e7059b25e94b8f19687b70a58d39ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x513E 18344 bytes
font_02_sfnt_off00006c5d.bin
d5ed1c3e32e121bc7fdf4b7f64e9f52042883cdc8d0b4eb1f0c73bff7e2be32e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5D 4236 bytes

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