Malicious PDF — malware analysis report

Static analysis result for SHA-256 73eb34c744048a77…

MALICIOUS

PDF

40.4 KB Authoring application: PDFedit
MD5: 6051d0970b2bf723860bf49bed007250 SHA-1: 2a84a1fe68f44c59b0e0ffbb9026feeb7e5f6b68 SHA-256: 73eb34c744048a776aef4529cdbd51a58488fd81866e8f0728ae0aec4bebafeb
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO link farms or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the extensive link farm suggests a mechanism for distributing further malicious content or for SEO manipulation.

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://ironsidepictures.com/uploads/1/3/0/5/130588924/8579937.pdf
    • http://thepostgradproject.com/uploads/1/3/0/7/130775979/natide.pdf
    • http://subudappid.org/uploads/1/3/0/4/130488694/8267688.pdf
    • http://proautocareers.com/uploads/1/3/0/5/130540788/377715ce.pdf
    • http://sacvalleypettingzoo.com/uploads/1/3/0/2/130291649/3473609.pdf
    • http://mail.vineyardmuscatine.com/uploads/1/3/0/7/130740202/vubewituwuliju-kelebojisuromow.pdf
    • http://mnguidedgoosehunting.com/uploads/1/3/0/7/130775277/tajisasufi.pdf
    • http://affordablypricedphotosandvideo.com/uploads/1/3/0/2/130289218/kojurazizek.pdf
    • http://galaticcantina.com/uploads/1/3/0/2/130291492/vunugiv.pdf
    • http://shaggaholics.com/uploads/1/3/0/5/130545998/3141224.pdf
    • http://www.simplychrissyk.com/uploads/1/3/0/6/130621818/gixox_romematubujo_kasavukoweju.pdf
    • http://dasrausa.org/uploads/1/3/0/4/130436298/danavizinumi_siwebisifusuv_bixelog.pdf
    • http://divineemergence.com.au/uploads/1/3/0/7/130775892/xatogoduvisuz-zukeregeti-sakopawemudo.pdf
    • http://www.keysosaurus.com/uploads/1/3/0/5/130589342/88bac.pdf
    • http://mochapterseven.com/uploads/1/3/0/5/130546742/susaxorokijanamis.pdf
    • http://www.weruntheforest.co.nz/uploads/1/3/0/9/130969406/voxij_dexarupavidoze_fisemilata_widot.pdf
    • http://jna4x2.bdgct.com/uploads/1/3/0/9/130969166/130969166.html#encyclopedia+of+indian+medicinal+plants

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004183.bin
15c985fe998608fb74be97eed3a907969a8f966673ca2809ab3451797cd60fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4183 8204 bytes

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