Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2bba10dbc35159…

MALICIOUS

PDF

59.6 KB Authoring application: Adobe PDF Library 9.0
MD5: f5f4c8539bbbb516f03a526c2c8551be SHA-1: 41d629f659e50b1ff86cf27dd7ca2055bef9a286 SHA-256: 1a2bba10dbc35159544c6ba168769871fb108c0ee74d3162ec3c74cf8ecb8b34
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, aligning with the PDF_SEO_LINK_FARM heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://overthetoprentals.com/uploads/1/3/0/6/130620931/5858489.pdf
    • http://ingeniousrealestate.com/uploads/1/3/0/5/130588257/19d9ea.pdf
    • http://icpreschooltn.org/uploads/1/3/0/7/130775640/7488141.pdf
    • http://naddin.space/uploads/1/3/0/2/130289580/4104984.pdf
    • http://mjacoby88.com/uploads/1/3/0/7/130776218/4272597.pdf
    • http://snalbins.com/uploads/1/3/0/6/130604742/4d15b61c844.pdf
    • http://davidmarwick.com/uploads/1/3/0/3/130379158/7462950.pdf
    • http://planetarywellbeing.org/uploads/1/3/0/6/130620584/691163.pdf
    • http://admin.solsticeastrology.com/uploads/1/3/0/4/130476065/7531051.pdf
    • http://immediateinsight.com/uploads/1/3/0/5/130551920/fowiwewisitipo-toweluvav.pdf
    • http://www.cjrsscorpions.com/uploads/1/3/0/6/130639861/b44a3b0542a7ac.pdf
    • http://swctoa.com/uploads/1/3/0/3/130323190/zufevakuzunibor.pdf
    • http://narskuuttelu.com/uploads/1/3/0/7/130739459/muloxa_kevilamazinur_wemewetutob_rowubugunam.pdf
    • http://plunkettandgibson.com/uploads/1/3/0/7/130776855/4081282.pdf
    • http://reteish.com/uploads/1/3/0/7/130738780/0ace4acd6bf4af2.pdf
    • http://skinnymanjerky.com/uploads/1/3/0/6/130639539/4698670.pdf
    • http://zendreaming.com/uploads/1/3/0/6/130604251/sonuzapudagod.pdf
    • http://dev2018.digcitinstitute.com/uploads/1/3/0/3/130313155/130313155.html#aetna+medicare+ppo+doctor+list

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000485f.bin
41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x485F 2600 bytes
font_01_sfnt_off000051f7.bin
361b85bfb0be784de2f5fac2ce420f7952908acdbce1636a577e7a933dd7a9fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51F7 17612 bytes
font_02_sfnt_off00008a2c.bin
4ba57aa61846fbae0f9f95c754b887ba5782e119dca6cc22e8a2e773bf6c1dc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2C 9508 bytes

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