Malicious PDF — malware analysis report

Static analysis result for SHA-256 76c4bb9e81b0f648…

MALICIOUS

PDF

38.0 KB Authoring application: PDFBox
MD5: 0d34f347899dce9b08e5c46212f750b4 SHA-1: 6d7df4f6925c3a8c9bc965b258c6eb6fcf62b5a5 SHA-256: 76c4bb9e81b0f648dc7b5860f25869b4c0736ccfefc38f14ee5ac0410ef1674a
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or SEO manipulation campaign. It contains a large number of links to external PDF files hosted on various domains, with many using numeric slugs in their paths. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support a malicious classification. The embedded URLs are likely used to redirect users to malicious sites or to distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • 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://matthewgeller.net/uploads/1/3/0/7/130776196/puderaxobimome.pdf
    • http://bardfamilymarketgarden.com/uploads/1/3/0/7/130738831/dubofapudodide-gepiv.pdf
    • http://drinkbelle.com/uploads/1/3/0/5/130545698/dunilabeluritanezawe.pdf
    • http://moheal-moringa.com/uploads/1/3/0/6/130621284/40e5f5ad2.pdf
    • http://manningmobilemechanical.com/uploads/1/3/0/7/130776118/e4019899e7324.pdf
    • http://mawmawsbakery.com/uploads/1/3/0/8/130873958/9748002.pdf
    • http://vizualpost.net/uploads/1/3/0/2/130289546/4846518.pdf
    • http://nebraskansunitedforthegoodlife.net/uploads/1/3/0/5/130539238/610c1001a9.pdf
    • http://adammarkeckman.com/uploads/1/3/0/2/130288600/7943490.pdf
    • http://alanmg.com/uploads/1/3/0/3/130323290/dulalagul-dezoj-dubex.pdf
    • http://nhsilbert.net/uploads/1/3/0/6/130639233/gewuto-rugowa-guxixotav.pdf
    • http://weefestival.com/uploads/1/3/0/6/130620700/7933358.pdf
    • http://friendlyfarmersfridge.com/uploads/1/3/0/7/130739831/wejororureferamurem.pdf
    • http://mrs-hartleys-class.com/uploads/1/3/0/2/130271214/2f4e297c67ae.pdf
    • http://forthepits.com/uploads/1/3/0/6/130621382/0ba87d940.pdf
    • http://mypromobook.com/uploads/1/3/0/4/130483194/todawajote-direvuxefepir-rudizubiwufod-lesesanogonasa.pdf
    • http://miputt.com/uploads/1/3/0/6/130639249/5953581.pdf
    • http://californiahydrogenwater.com/uploads/1/3/0/4/130435966/1307673.pdf
    • http://rev1ps.com/uploads/1/3/0/2/130289305/6357615.pdf
    • http://freelancefreedom.org/uploads/1/3/0/6/130620936/898444.pdf
    • http://www.tootsietrendsboutique.com/uploads/1/3/0/7/130738623/jumigujagidon.pdf
    • http://www.south40films.com/uploads/1/3/0/7/130775265/1220037.pdf
    • http://stripclubsnetwork.com/uploads/1/3/0/4/130476896/4b4cd72.pdf
    • http://burgconstruction.net/uploads/1/3/0/6/130621673/nesurix.pdf
    • http://tacticalvalkyrie.com/uploads/1/3/0/6/130604083/terakevonadoronuroso.pdf
    • http://q7vln.bpmtc.com/uploads/1/3/0/3/130313398/130313398.html#more+greek+and+latin+roots+creative+teaching+press+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000306e.bin
05061099068afea38731448db464a7078a52e56c0969522ac00a41c5668fe8f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x306E 7760 bytes

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