Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e303be81faf4811…

MALICIOUS

PDF

67.6 KB Created: 2021-02-28 06:01:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e170fbd605f9cc41cff8ecce247bc5c5 SHA-1: a39523ff3dc1dc00d17bc3746cb35a48d281f0d1 SHA-256: 0e303be81faf4811e5c39f6183e58396fdfd9bdcf251e445b40eac2d335fa2b4
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious or phishing sites, and the PDF structure suggests it acts as a link farm. The document body, though partially corrupted, references 'How often newborns should poop', a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9360

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/aws?utm_term=how+often+newborns+should+poop PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4503214/normal_5fcf2e7eace47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389601/normal_6027c927be705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_602a1993f0aeb.pdfIn PDF document text
    • http://ndfnasg.xyz/39259840299is2g8.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/liminal_thinking_review.pdfIn PDF document text
    • http://dekiweragaf.mywebcommunity.org/mulagigapivuwuvino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5fd974d23b250.pdfIn PDF document text
    • https://rajopolaxobi.weebly.com/uploads/1/3/1/4/131406270/ace59856b33.pdfIn PDF document text
    • http://xakidofe.sportsontheweb.net/dell_precision_m4700_drivers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448536/normal_5fdfcb140df10.pdfIn PDF document text
    • https://naluzakagowu.weebly.com/uploads/1/3/1/4/131411806/sejepokebakeb_wagukokuw.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_off0000f357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF357 5112 bytes
SHA-256: 36d1fd72f9e122da8df583a93756c76a0c9f32a23387074e623dbdcabc769e6f

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