Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea319d8ad7277461…

MALICIOUS

PDF

36.7 KB Authoring application: Adobe PDF Library 9.0 First seen: 2020-09-24
MD5: b2ebdaa1086fc142c597094b11366267 SHA-1: 4f07a3eed576bc22c3c7832b7b8be25d5572ba52 SHA-256: ea319d8ad7277461bfbb8f50d0ca2ac6b85fea3a88d14fd4c60b245f762558a7
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO poisoning attack. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier further support its malicious nature. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://arsenicofjabir.com/uploads/1/3/0/2/130270864/cdc926b5398adc.pdf In PDF document text
    • http://mrpsmathclass.com/uploads/1/3/0/6/130621178/suxubajopatarimi.pdfIn PDF document text
    • http://ininmotion.com/uploads/1/3/0/4/130489475/4450096.pdfIn PDF document text
    • http://tutorloft.com/uploads/1/3/0/5/130544953/libipuwiwesazuj.pdfIn PDF document text
    • http://www.laurengarciaphotography.com/uploads/1/3/0/8/130814858/dorogisowawu_fuzaso.pdfIn PDF document text
    • http://leannephilip.com/uploads/1/3/0/4/130435679/pisimogiduzabajo.pdfIn PDF document text
    • http://northeastminneapoliselectrician.com/uploads/1/3/0/5/130541462/db973f916bf72.pdfIn PDF document text
    • http://www.chiltonestate.org.uk/uploads/1/3/0/6/130604666/vafomovaxi.pdfIn PDF document text
    • http://sandsmnl.com/uploads/1/3/0/6/130621607/0122def18f7.pdfIn PDF document text
    • http://duilawvt.com/uploads/1/3/0/2/130288540/1af10f.pdfIn PDF document text
    • http://reveil-corporel.com/uploads/1/3/0/5/130538941/kiketinobofatutede.pdfIn PDF document text
    • http://bayswaterlacrosse.com/uploads/1/3/0/7/130740252/88495a19d2.pdfIn PDF document text
    • http://santeeautobody.com/uploads/1/3/0/6/130621715/dd9939.pdfIn PDF document text
    • http://ibuyelectronic.com/uploads/1/3/0/6/130604527/58cfe7d.pdfIn PDF document text
    • http://london-office-6.pleasingfood.com/uploads/1/3/0/5/130550764/130550764.html#sol+space+occupying+lesion+adalahIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000372c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x372C 7324 bytes
SHA-256: 9edfc8eb6bda078460a9e565dc8d0872e8152132fb74092ec77051b1a6c88c4e

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