Malicious PDF — malware analysis report

Static analysis result for SHA-256 33960d58c64e3f1a…

MALICIOUS

PDF

37.0 KB Authoring application: SWFTools
MD5: a0c38dd2f3d11dd50fe4b87f4ca91916 SHA-1: f984fe8c090aa4f607645b74de5bd46957af7962 SHA-256: 33960d58c64e3f1a42a75f99bc3b4f2cd353437c4cc1ee149a19435741fad085
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The PDF contains a large number of embedded links to other PDF files hosted on various domains, suggesting a link farm or distribution mechanism. The document body text, while appearing benign, is likely a lure to disguise the malicious nature of the embedded links.

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://apkzebra.com/uploads/1/3/0/7/130740180/begonuban.pdf
    • http://alpha.ph-eiti.org/uploads/1/3/0/4/130476503/bixowesina-rojikedi.pdf
    • http://adams-aardvarks.com/uploads/1/3/0/6/130603728/toxoveloz.pdf
    • http://iqcreditunion.net/uploads/1/3/0/4/130476207/zemidokejago_godos_nitonixokaj.pdf
    • http://localleadgame.com/uploads/1/3/0/5/130550976/6830384.pdf
    • http://ctbfresh.com/uploads/1/3/0/6/130639774/afe0f48853.pdf
    • http://kulturperlen-salling.dk/uploads/1/3/0/5/130588795/c78e41c3fc4dcea.pdf
    • http://lenke-nauck.com/uploads/1/3/0/6/130621479/bf0fe30.pdf
    • http://missjefaa.com/uploads/1/3/0/5/130551615/130551615.html#how+to+combine+multiple+pdfs+with+adobe+reader

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011b1.bin
47a001ede8a5b3a1cb62866061bf8ea3d7aa31626b45753887543c802e6ff1fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1 8200 bytes

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