Malicious PDF — malware analysis report

Static analysis result for SHA-256 e36c5e80f6afbd18…

MALICIOUS

PDF

29.2 KB Created: 2020-10-03 12:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 78ec5bb180fadbbb9aecfbffa1805be7 SHA-1: 1adc001d9e4afd9ce5bc2282c81ade6e93cba3ee SHA-256: e36c5e80f6afbd1815d26a016aca5811c5d6bcc361bbc72f2ae7810b6d20e827
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though corrupted, appears to be a worksheet, suggesting a lure to trick users into clicking the malicious links. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://gettraff.ru/strik?keyword=blank+map+of+continents+and+oceans+worksheet In PDF document text
    • https://site-1038349.mozfiles.com/files/1038349/49537722659.pdfIn PDF document text
    • https://site-1037864.mozfiles.com/files/1037864/14244547194.pdfIn PDF document text
    • https://site-1036667.mozfiles.com/files/1036667/36802628393.pdfIn PDF document text
    • https://site-1037177.mozfiles.com/files/1037177/22865360290.pdfIn PDF document text
    • https://site-1038920.mozfiles.com/files/1038920/loxixuke.pdfIn PDF document text
    • https://site-1036722.mozfiles.com/files/1036722/ziwojidikoti.pdfIn PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/gobetazijukopedevotimore.pdfIn PDF document text
    • https://site-1039235.mozfiles.com/files/1039235/6915326954.pdfIn PDF document text
    • http://wevino.animachristiretreats.org/uploads/1/3/0/7/130776008/4424f.pdfIn PDF document text
    • http://files.eastcoastvintagemx.com/uploads/1/3/0/8/130814466/1338480.pdfIn PDF document text
    • http://mixanaj.holeintherockministries.org/uploads/1/3/1/4/131437544/tijosisizuxagexenaj.pdfIn PDF document text
    • http://bupadof.softcinch.com/uploads/1/3/1/3/131380504/dd7776096a0e34b.pdfIn PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/bowiwa.pdfIn PDF document text
    • https://site-1040665.mozfiles.com/files/1040665/lunalaxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3F 5600 bytes
SHA-256: 827702eeec0b97e3a3a397a431afd8ac03320fe01d2f1508c1768e2569d5f61b

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