Malicious PDF — malware analysis report

Static analysis result for SHA-256 be462573702521ac…

MALICIOUS

PDF

38.7 KB Authoring application: LibreOffice
MD5: edfe4b6e4a6bd328b03b4feb76888455 SHA-1: 6fd34255bd3e6d5a82af2a937c935865c8731ca4 SHA-256: be462573702521ac5fd912cc96abf38a1b4e749f869a9271401e7914f60eedbc
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique commonly used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support a malicious classification. The document body, though heavily obfuscated, contains URLs that are likely part of this link farm, suggesting the primary goal is to drive traffic to these external resources.

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://farmhub.online/uploads/1/3/0/6/130620917/536d1b.pdf
    • http://mmgastore.org/uploads/1/3/0/4/130477882/gozelanigizu-sojisidefe-didukew.pdf
    • http://mrssnydersclass.com/uploads/1/3/0/5/130540928/3fff6c3d7.pdf
    • http://zepuki.foodtrucksquare.com/uploads/2020/01/28/4823185.pdf
    • http://pfbclan.com/uploads/1/3/0/7/130740117/wunetiwibewile.pdf
    • http://regexecution.net/uploads/1/3/0/4/130488839/balulim_fanudumada.pdf
    • http://srglasswarehouse.com/uploads/1/3/0/4/130490036/5862594.pdf
    • http://devbookkeeping.com/uploads/1/3/0/7/130776827/tonez.pdf
    • http://learning-sciences.com/uploads/1/3/0/2/130271023/bedutilew-bozujuwigen-disasuro-sonagowuvex.pdf
    • http://premieraccountinsurance.com/uploads/1/3/0/2/130271111/berivi_magidubenof_duzomulesu.pdf
    • http://antiviruseprotectserviceonline.site/uploads/1/3/0/2/130272477/130272477.html#hip+strengthening+exercises+resistance+bands

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012c3.bin
e8b09e34b5d14abac06d80893f2df959ba6542bd7d285efdd52e9583b70b5aa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3 8048 bytes

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