Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb9eaa369546e74…

MALICIOUS

PDF

38.2 KB Authoring application: Smallpdf Desktop First seen: 2020-09-24
MD5: 6afa736931c14ca2e6feacba10e10ac6 SHA-1: fee1fce5324d911a1f59e5e3ca7e87c216bd32d0 SHA-256: aeb9eaa369546e7468485d45f49e3479d96ca8560c36a6244649135b2c7b334f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body text, though partially corrupted, mentions a 'Pet test 3 reading and writing answers' and includes several URLs. This suggests a phishing or scam attempt where users are directed to external sites under the guise of an exam. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://boyscoutwhistle.com/uploads/1/3/0/7/130740180/tixajab-goxubetitawixak-kaforovup-rilisefoginu.pdf In PDF document text
    • http://pixelpush.net/uploads/1/3/0/4/130435685/9459242.pdfIn PDF document text
    • http://obedientsoftware.com/uploads/1/3/0/4/130476499/3219802.pdfIn PDF document text
    • http://moscowshamrocks.com/uploads/1/3/0/4/130489222/wisex_bijupuvu.pdfIn PDF document text
    • http://hosainrahman.com/uploads/1/3/0/2/130289304/wewakulavuso_jafiba_titapokomaku_datuku.pdfIn PDF document text
    • http://avivaclayman.com/uploads/1/3/0/2/130288962/1c0b78360e33aba.pdfIn PDF document text
    • http://mrsbrennersbiology.com/uploads/1/3/0/2/130272890/7493259.pdfIn PDF document text
    • http://mindforyou.org/uploads/1/3/0/6/130604342/130604342.html#pet+test+3+reading+and+writing+answersIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5 8276 bytes
SHA-256: 3243dbc31c0b5ed72b945d7d354c6d38bb7668d48ddb23b6b76ec6761b345096
font_01_sfnt_off00004eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EEC 16036 bytes
SHA-256: f335bbb8769c533cbca16f6384a9be7e2e65528b9693bf598f9b6a21ed261b2e

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