Malicious PDF — malware analysis report

Static analysis result for SHA-256 883d51444dd16ad4…

MALICIOUS

PDF

39.7 KB Authoring application: pstoedit
MD5: b24d2251a1ec80e25a9fecb6804bcbf7 SHA-1: b0869933048ccd696a1fe9c2bd4958b9c9c72b6c SHA-256: 883d51444dd16ad42c26d2ea70e456d3f7e29976259595ca550ce4dc6751f0bd
150 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URLs suggest a phishing or malware distribution campaign, aiming to redirect users to potentially harmful content.

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://audiouauto7.icu/uploads/2020/01/28/kexedabe.pdf
    • http://kaleokafe.com/uploads/1/3/0/5/130589278/lovugofajave_jojuva.pdf
    • http://newtcabin.com/uploads/1/3/0/6/130620996/9210359.pdf
    • http://amwna.org/uploads/1/3/0/5/130539279/jekanutumozo-zawafesevegu-defakuzabanabiv-nunugedamenib.pdf
    • http://repwavets.org/uploads/1/3/0/5/130550960/9500422.pdf
    • http://drugssaidno.com/uploads/1/3/0/6/130639143/zolagasevuzepek.pdf
    • http://kathiegreenmedia.com/uploads/1/3/0/6/130605396/5dc69f.pdf
    • http://mustardseedslp.com/uploads/1/3/0/5/130541140/6739881.pdf
    • http://signranger.weebly.com/uploads/1/3/0/5/130588924/9181771.pdf
    • http://mymagnificentmess.com/uploads/1/3/0/5/130589094/641f0621cc73c68.pdf
    • http://baguiosoundsrental.com/uploads/1/3/0/5/130539449/130539449.html#bottom+sheet+fragment+with+recyclerview+android

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000129c.bin
a192caf49dbf674de5a5f3778b23815c7c77da4a8ea32a0d01e0b00b69ff3a4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129C 8648 bytes

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