Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d29221b57c6ccd8…

MALICIOUS

PDF

61.8 KB Authoring application: PDFBox
MD5: fc5eb4b7aad627b97b38dc016557df0d SHA-1: 8586c835fe31547b455bcd358b61f9735a1f1074 SHA-256: 7d29221b57c6ccd8feb94d9e9d4f09daf1e72c17ff39c2bd4109dd12f7801dc2
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics, including ClamAV and a machine learning classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic identified a large number of external links, with the first being http://bludogstone.com/uploads/1/3/0/2/130270775/626b98b6f80a.pdf. This suggests the document is designed to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://bludogstone.com/uploads/1/3/0/2/130270775/626b98b6f80a.pdf
    • http://nux.provape.ru/uploads/2020/01/29/rorila.pdf
    • http://mupe.buket99.com/uploads/2020/01/28/306e891aa483f21.pdf
    • https://kojaweris.weebly.com/uploads/1/3/0/6/130603961/gerifikegeguwuz.pdf
    • https://tefusumo.weebly.com/uploads/1/3/0/3/130323811/getiwatovevol-xovewuzine.pdf
    • http://mabufow.vipiski-egrn9.icu/uploads/2020/01/28/adf9dfbeaf18.pdf
    • http://waterworks.nu/uploads/1/3/0/5/130589415/zufopusosanawugawis.pdf
    • http://simonjamesfurniture.com/uploads/1/3/0/4/130483959/poxapagokif.pdf
    • https://tukofozi.weebly.com/uploads/1/3/0/5/130588473/pawuxatanifinetuv.pdf
    • http://beingself-centered.com/uploads/1/3/0/5/130547112/130547112.html#double+triple+quadruple+penta+hexa

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001490.bin
ec831c1dd04fe79bb5b0b23c7cb522afccb3b04c92629d29108ab82a806a0488		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1490 9924 bytes
font_01_sfnt_off00008c17.bin
b500eee6971bc686ba750e8d2af752c7b86bed2e4a7c85c184208a355e2f28ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C17 5572 bytes
font_02_sfnt_off00009dbc.bin
dac8d876c78c4c849d37d8144d90905cba3aaeceadc2ffd6c9111abe3504e0a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DBC 3640 bytes
font_03_sfnt_off0000a9c4.bin
b43c269037dcfee3bc4fbdd838c35344a619bd8eb13c0d7dd79f7fcc36beec96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9C4 16684 bytes

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