Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0a6e0a6e7fe98e…

MALICIOUS

PDF

39.7 KB Authoring application: pdf-parser
MD5: 72d92e83a2b0d56189aa5390c87e4880 SHA-1: 632166392d03b7aee1280dedef67b4ac9511039d SHA-256: 0b0a6e0a6e7fe98e0e1f5cf3792c61c891841e3515eab66272eeec9a393381ed
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links to external PDF files hosted on various domains, indicating a link farm or redirection strategy. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted from this sample, and the document body was heavily obfuscated and unreadable.

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://shopexpressionclothing.com/uploads/1/3/0/2/130271076/6012881.pdf
    • http://www.bcsgrubbox.com/uploads/1/3/0/6/130605030/visegakusagame.pdf
    • http://pugetsoundbirthingfromwithin.com/uploads/1/3/0/5/130589078/fagozelikumi-woxanifutexow-jilivobotovutoj-navexula.pdf
    • http://blessedwomenfeedingthehomeless.com/uploads/1/3/0/4/130483583/gafujanose_tigurikalabidop.pdf
    • http://applepickndays.com/uploads/1/3/0/6/130639860/e4f19ffa.pdf
    • http://michaelphelannotary.com/uploads/1/3/0/8/130813876/a86e1b20f.pdf
    • http://www.familyhartlen.ca/uploads/1/3/0/7/130739809/6d18adb780f.pdf
    • http://mitgliederbereich.bauberater-kdr.de/uploads/1/3/0/7/130775203/zibebigol-lobafup-dilukalek-newugofuz.pdf
    • http://www.openmindscrystalhealingjewlery.com/uploads/1/3/0/2/130289291/6988808.pdf
    • http://www.nikkishandmadeboutique.com/uploads/1/3/0/5/130588444/0c9ad2ca7.pdf
    • http://bdplumbingservice.com/uploads/1/3/0/5/130551898/lozabotuliruku.pdf
    • http://lindalanza.net/uploads/1/3/0/6/130620674/bda78ac817423.pdf
    • http://cpanel.oriendra.com/uploads/1/3/0/2/130287413/130287413.html#present+continuous+tense+exercises+pdf+perfect+english

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004329.bin
bfa206bd3b7f4e3cc2821481c932395dbd5994be340e0da24056e2080aee10e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4329 7812 bytes

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