Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e879f37fb5d421…

MALICIOUS

PDF

73.6 KB Created: 2021-03-03 06:22:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 034e8af3979e7c3860eca3a5d611d79c SHA-1: 08d7ccb37ceb70ecf62c1e2f4ff5587ab8d2ad79 SHA-256: 16e879f37fb5d421c4143d9102b75a909c060249237eaac5d41df105a8898dd3
124 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, disguised as a search result for a common problem. This suggests a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9740

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=craftsman+precision+plus+lawn+mower+won%2527t+start PDF link annotation
    • https://sokikafumuwo.weebly.com/uploads/1/3/4/6/134697409/zubovupi_xufutevolulag_pubas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_5fd62bf8e7332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449973/normal_601c6afeadc3e.pdfIn PDF document text
    • https://dinuboxisoxim.weebly.com/uploads/1/3/1/8/131857966/4825328.pdfIn PDF document text
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/sabogewo.pdfIn PDF document text
    • https://jexabuwojese.weebly.com/uploads/1/3/1/3/131384148/vavapo-padaruxogek.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/jitote.pdfIn PDF document text
    • https://folenepawesig.weebly.com/uploads/1/3/2/6/132680852/1232302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460063/normal_601ce0c8c24da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/doxifuba/54207179572.pdfIn PDF document text
    • http://janofegiwene.epizy.com/85760846156.pdfIn PDF document text
    • http://xakitidopapav.epizy.com/install_linux_os_on_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/19128262404.pdfIn PDF document text
    • http://lexaxixamu.rf.gd/45664932261.pdfIn PDF document text
    • http://gesesasogibigaw.rf.gd/tuvugu.pdfIn PDF document text
    • http://duposul.epizy.com/bomube.pdfIn PDF document text
    • http://pususarejopo.epizy.com/cen_tech_4_in_1_portable_power_pack_air_compressor.pdfIn PDF document text
    • http://lutodize.epizy.com/brother_hl-l2380dw_print_from_iphone.pdfIn 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_off000117d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D1 5192 bytes
SHA-256: 488d2137e2c659bd1a7068e2a7b37d0c1b3726207a11422bdc3e8f557c289753