Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a275120f39dbfa0…

MALICIOUS

PDF

43.9 KB Authoring application: Smallpdf Desktop
MD5: 565c720f1ebbb446dddc0d8ba735b892 SHA-1: 2608d5a6952fc1301207d10af1fff7c1dc780014 SHA-256: 0a275120f39dbfa002135717d233e0c947e74c096dc4e9a03fb6fd929277e9c9
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing attempt. The document body, though partially corrupted, suggests a lure related to an internship reply letter. The embedded URLs point to other PDF files, indicating a likely phishing campaign where the initial PDF serves as a lure to download a further malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ericamcquiddypsyd.com/uploads/1/3/0/2/130272493/bozekosu.pdf
    • http://fuzzymoon.net/uploads/1/3/0/6/130639882/laxelolefusi.pdf
    • http://whatdoyousee.art/uploads/1/3/0/7/130738524/lujed.pdf
    • http://kylealpha.com/uploads/1/3/0/5/130590763/330515.pdf
    • http://clucktruckportland.com/uploads/1/3/0/5/130544898/130544898.html#internship+reply+letter+sample
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001024.bin
a5b9c04bf106c079f15f2547269a44040975404c8748e7b3f6e4bd96c545b9d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1024 8656 bytes
font_01_sfnt_off000065e4.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E4 16036 bytes

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