Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c30abf6175bcc6c…

MALICIOUS

PDF

37.3 KB Authoring application: PDFBox
MD5: e358fa1103370deedc131cc8acaaff61 SHA-1: 14556de9608f9b1fd3a8edd30ebd1ad02c618aca SHA-256: 8c30abf6175bcc6cc3eea734c106dea7efd62efda0b4dcc85b7c7f8c4eea24e0
152 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier indicated a high probability of maliciousness. The critical heuristic PDF_SEO_LINK_FARM indicates the document contains a mass of external PDF links, with the primary domain being animspree.com. The document body also contains these links, suggesting a lure to a network of malicious PDFs.

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://animspree.com/uploads/1/3/0/2/130289493/seribiwedef_kikupixexazig_jenudasijuvutev_gizupinoxoxu.pdf
    • http://customer-day.azzure-it.com/uploads/1/3/0/6/130639747/rovojoka.pdf
    • http://kristen-stone-the-writer.com/uploads/1/3/0/6/130639439/nalor_vadefafasul_pasapubojaboz.pdf
    • http://senokolib.gkmosolov.ru/uploads/2020/01/28/629eb.pdf
    • http://jslbinvestments.com/uploads/1/3/0/6/130620567/pofokaxorum_wiwikomirowin_jadexad_relamer.pdf
    • http://newkids.co.uk/uploads/1/3/0/7/130775520/robofevogezev.pdf
    • http://kylaconner.com/uploads/1/3/0/6/130604947/130604947.html#action+research+arm+test+kit+uk

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001180.bin
85fe113ec999cbf36dc078002fa6b9b90aaf341e0c66988c318051c7c758fd84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1180 8544 bytes

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