Malicious PDF — malware analysis report

Static analysis result for SHA-256 4729d29926d83bca…

MALICIOUS

PDF

38.0 KB Authoring application: Mobipocket Creator
MD5: badc43f8d91261ab6ff455af8fe242c8 SHA-1: 62d8b0b6364a7477d9441d8cdf4ef02fcca6b212 SHA-256: 4729d29926d83bcab8f6578e6aaa57499baca06c0071f4ce56eb12cd2d5e215a
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF documents, a technique commonly used for SEO manipulation or to distribute malicious content. ClamAV detection and ML classification strongly indicate malicious intent. The embedded URLs suggest a phishing or content distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ministryops.net/uploads/1/3/0/4/130435702/4858833.pdf
    • http://unspoiledpodcasts.com/uploads/1/3/0/6/130620296/06959241a40dd2c.pdf
    • http://petsdr.net/uploads/1/3/0/4/130490421/4903709.pdf
    • http://dragonflylivestockranch.com/uploads/1/3/0/5/130551162/niwunaxeg.pdf
    • http://sima-se-design.com/uploads/1/3/0/5/130539366/42cdc22a878bd.pdf
    • http://advantagedroneproductions.com/uploads/1/3/0/3/130312971/8212987.pdf
    • http://summercourt.biz/uploads/1/3/0/2/130289649/75ae0d40a6.pdf
    • http://jivopin.marveldc.ru/uploads/2020/01/28/jatiwobim.pdf
    • http://frostconcrete.com/uploads/1/3/0/2/130270799/6057352.pdf
    • http://hello-baby-toys.com/uploads/1/3/0/4/130483385/130483385.html#innate+adaptive+immune+system

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011df.bin
bb639490a2a44a678cd64ed80c50008853a9a466b81f046d3d4c4eaccdc60d02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF 8108 bytes

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