Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bda0bdc00c85fd7…

MALICIOUS

PDF

34.2 KB Authoring application: Serif PagePlus
MD5: bd6883add9a9af03d517b68f8b0267a3 SHA-1: 946a5f96fcc14feee9ac0d1a9232d4635dfe60d3 SHA-256: 8bda0bdc00c85fd7296388aad3292aa6f0d85522bc71f76d1fb7e82d7c4d214d
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier further support the malicious nature of this file. No scripts were extracted from this sample, limiting the analysis of direct execution capabilities.

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://bobcatinfo.org/uploads/1/3/0/2/130271077/merunogifipimim-kawiv.pdf
    • http://rootgreen.com/uploads/1/3/0/5/130542781/c6988e9.pdf
    • http://transcendtext.com/uploads/1/3/0/4/130435743/57964.pdf
    • http://wundrmediapro.com/uploads/1/3/0/2/130289461/xunopi.pdf
    • http://jfainnovative.com/uploads/1/3/0/7/130738978/43f5b.pdf
    • http://ftnstudios.com/uploads/1/3/0/3/130313249/sukuvelif.pdf
    • http://thecollectorsoutpost-store.com/uploads/1/3/0/6/130621310/wudawemoz-renivav.pdf
    • http://moonlitdreamspublications.com/uploads/1/3/0/6/130639477/23561.pdf
    • http://mazatlanfoodtour.com/uploads/1/3/0/6/130639605/xijibop.pdf
    • http://masonrystonework.com/uploads/1/3/0/4/130483546/1310600.pdf
    • http://mafamillecenla.net/uploads/1/3/0/5/130539432/0275e6.pdf
    • http://back2hemp.com/uploads/1/3/0/3/130323186/6704391.pdf
    • http://100kchallenges.stefanaarnio.com/uploads/1/3/0/6/130620893/130620893.html#hip+impingement+exercises+to+avoid

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f5f.bin
019640c48e033803c65095d3b83d277e97ee5352c787069b34b73851169e8004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5F 7372 bytes

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