Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52d0b65abb3de24…

MALICIOUS

PDF

34.4 KB Authoring application: Pdftk
MD5: d226b5e7df7e2e23d28c4686eec874c7 SHA-1: efa251f6acd8e41501f2a7b8c7641167b3f95c9c SHA-256: a52d0b65abb3de24d045a2012b8a2806555e3d38aa4b4a75e63b19b43a062c09
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO poisoning or to redirect users to malicious sites. ClamAV and ML classifiers also flagged this file as malicious, specifically identifying it as a phishing or traffic-generating PDF. The document body itself appears to be corrupted or heavily obfuscated, making its specific content unreadable.

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://smsawani.com/uploads/1/3/0/4/130490665/76566.pdf
    • http://biltmorecreations.com/uploads/1/3/0/2/130270763/9230059.pdf
    • http://onlinesmdc.com/uploads/1/3/0/6/130620594/7759304.pdf
    • http://christianfemininity.org/uploads/1/3/0/6/130620265/ef09af6b8929a6.pdf
    • http://keykidoll.com/uploads/1/3/0/2/130287930/455cda.pdf
    • http://allencabinetshop.com/uploads/1/3/0/6/130639721/4921712.pdf
    • http://able-dp.com/uploads/1/3/0/2/130271201/ronekazibosejop_molujebu_kabanodumogo_pabasatorijovuw.pdf
    • http://naplesbesthairsalon.com/uploads/1/3/0/4/130435820/dokeb-xidomoto-zodofufid.pdf
    • http://battlecreekag.com/uploads/1/3/0/5/130541209/bc5795b96b3db.pdf
    • http://ethspe.com/uploads/1/3/0/6/130603803/f79c66bbbb7b.pdf
    • http://americanrentalspecialties.net/uploads/1/3/0/7/130739705/kumuxijonolil_dozipisifez.pdf
    • http://modelmefamous.com/uploads/1/3/0/6/130605165/7880475.pdf
    • http://adsl-63-204-18-52.benefitplans.org/uploads/1/3/0/6/130604644/130604644.html#rapid+sand+filter+working+principle

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c56.bin
370dd5a46d4f0454536cb8acc37f2c15bcdaa3ca0ead8e6e082cdc61918e0623		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C56 8928 bytes

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