Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae77df1fb9f73415…

MALICIOUS

PDF

34.9 KB Authoring application: Karbon
MD5: 325e740e4693a5acaed9ed18e2127cef SHA-1: 3238b6bf1ee20e6fdd188c08919068f9eeca460c SHA-256: ae77df1fb9f734154d918116c9b080d8d97f8f3bf2ae5206ca5d5f075372ec0b
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic identified a large number of external links, with 'rentnearfiu.com' being a dominant host. These links are likely used to redirect users to phishing sites or download further malicious content. The document body contains garbled text, suggesting it is not intended for human consumption but rather as a container for these malicious links.

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://rentnearfiu.com/uploads/1/3/0/4/130435755/9f668c906dc73.pdf
    • http://jewel-vine-5a1f33cddc49f.mynewonline.store/uploads/1/3/0/3/130313316/ff3bc.pdf
    • http://www.hollysharvest.com/uploads/1/3/0/9/130969587/kasokogivugad.pdf
    • http://rnnext.org/uploads/1/3/0/7/130738615/7463941.pdf
    • http://hinomotorsnuevaecija.com/uploads/1/3/0/2/130288673/98604d.pdf
    • http://michaeleggerl.com/uploads/1/3/0/7/130739524/3169862.pdf
    • http://milwaukeesfavoritedj.com/uploads/1/3/0/4/130476747/ruvipogoloraxor.pdf
    • http://1577kenewastreet.com/uploads/1/3/0/7/130776678/b233f8bc.pdf
    • http://www.spokaneboudoirphotography.com/uploads/1/3/0/5/130552073/370b7cce8a58e0.pdf
    • http://barnwoodbilliards.com/uploads/1/3/0/7/130776418/rufitedu.pdf
    • http://highspeedstaffingco.tech/uploads/1/3/0/7/130739006/9800389.pdf
    • http://aeroagt.com/uploads/1/3/0/4/130476688/e8d7894db0.pdf
    • http://theworldofboden.com/uploads/1/3/0/6/130605002/80574.pdf
    • http://lolaandjack.com/uploads/1/3/0/5/130543665/jilob.pdf
    • http://expopul.com/uploads/1/3/0/2/130291493/rejodajomodadat_wokixuno.pdf
    • http://www.victoriachairsrental.com/uploads/1/3/0/5/130589238/senoberux-rimava-paninesoxevara.pdf
    • http://5mkq7.salon225.com/uploads/1/3/0/8/130813837/130813837.html#abellio+greater+anglia+easter+engineering+works
    • http://expopul.com/uploads/1/3/0/2/130

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c88.bin
2a1d1dc8f4ea433aabbc7459372a3160c0f8f6874100cc66da824608e3de975c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C88 7840 bytes

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