Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee590ec48becd5c…

MALICIOUS

PDF

43.5 KB Authoring application: GIMP First seen: 2020-09-24
MD5: cb6d1c45ed99ac834dd1cb6b836ab7c2 SHA-1: 6ce8c7182118d02f5c38025e4c9d0b4f1c820b38 SHA-256: 4ee590ec48becd5cfc3a9f4619fc1e99191d6ed22bf48656c707bbe512135ff7
192 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for other malicious content. 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 content is largely unreadable binary data, making it difficult to ascertain the exact lure.

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://debbiesdynamicdesigns.com/uploads/1/3/0/7/130740008/vokif.pdf In PDF document text
    • http://musicsquared.net/uploads/1/3/0/6/130620437/bae2030ba84e.pdfIn PDF document text
    • http://gorgeousboxersp.com/uploads/1/3/0/4/130476523/528cd2bf7a0b3.pdfIn PDF document text
    • http://tomorrowshappiness.com/uploads/1/3/0/4/130475992/b7d4856d.pdfIn PDF document text
    • http://nancytoofani.com/uploads/1/3/0/6/130603811/marejavixikem.pdfIn PDF document text
    • http://neisweets.com/uploads/1/3/0/4/130435872/modikojugobefeseka.pdfIn PDF document text
    • http://bbitrust.com/uploads/1/3/0/5/130540453/piwidajonubadivoxan.pdfIn PDF document text
    • http://landscapesuppliesandconstruction.com/uploads/1/3/0/2/130288552/mefodapafevuw.pdfIn PDF document text
    • http://theodishthoughts.com/uploads/1/3/0/3/130313037/d9acf13b82b3a.pdfIn PDF document text
    • http://mimiscoffeehouseofhardwick.com/uploads/1/3/0/6/130621108/2685850.pdfIn PDF document text
    • http://vpokerfriends.com/uploads/1/3/0/7/130776678/b94a9993a6ae3d.pdfIn PDF document text
    • http://onetenna.com/uploads/1/3/0/5/130539269/kofimogekuru.pdfIn PDF document text
    • http://electricalsource.info/uploads/1/3/0/5/130590661/mufepeviwox-mubatugow-sejug-jamigu.pdfIn PDF document text
    • http://fortrancraft.org/uploads/1/3/0/4/130436028/mijetewedulugow.pdfIn PDF document text
    • http://www.gpisgroup.com/uploads/1/3/0/5/130551229/wijevenik_vexor_fuxiripodo.pdfIn PDF document text
    • http://my-closet-online.com/uploads/1/3/0/5/130588468/5da716e8e9.pdfIn PDF document text
    • http://corustest.devsite-1.com/uploads/1/3/0/5/130540046/130540046.html#naming+and+drawing+aldehydes+and+ketones+worksheet+with+answersIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A8 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d
font_01_sfnt_off00004a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A44 9376 bytes
SHA-256: fbb95088c1cbb0e7ebaf9083ec4aafcb84bfa3193c3ff86f9d9cbfe3837808c6

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