Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c4195147a0fa6e5…

MALICIOUS

PDF

43.8 KB Authoring application: PDFedit First seen: 2020-09-24
MD5: 9a6d306e95e6e9bb2624a278dd0f4565 SHA-1: 2546e81cf32e5ee8a2be4b01c2725ba19e08c87b SHA-256: 4c4195147a0fa6e51f64c96baa63f301b8995db1f44e205f957d0d16b1d915cf
192 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. The document body mentions 'Cache cleaner pro 7. 1. 6 apk' and includes several URLs, suggesting a lure to download a fake application. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://karinkashmieklund.com/uploads/1/3/0/6/130604833/59809f.pdf In PDF document text
    • http://chihuahuafrentealcambioclimatico.com/uploads/1/3/0/4/130476359/9381204.pdfIn PDF document text
    • http://beeswim.com/uploads/1/3/0/5/130588653/1899848.pdfIn PDF document text
    • http://beavercrossministries.com/uploads/1/3/0/6/130604799/nuvizuzi.pdfIn PDF document text
    • http://boripev.1amulet.ru/uploads/2020/01/27/5e8decba735.pdfIn PDF document text
    • http://vipiski-besplatno11.icu/uploads/2020/01/28/ca68348.pdfIn PDF document text
    • http://ronsokolbooks.com/uploads/1/3/0/6/130639535/130639535.html#cache+cleaner+pro+7.+1.+6+apkIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD 8776 bytes
SHA-256: bbdc40bd18138d1ae19bacd0e815f7d29e553eee9c363a73118e52f0e0f4c894
font_01_sfnt_off00005bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC9 2604 bytes
SHA-256: 83d89f79375f7f339e88070a8779324ce221c94923bff415e388e162fbc46cfe
font_02_sfnt_off00006463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6463 16132 bytes
SHA-256: 50dc865112b31b8628c9170d82daeefa18b8227744a71909c0440548ffdcd4ea

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