Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c5fefca9ea9d23…

MALICIOUS

PDF

72.1 KB Created: 2021-06-10 10:39:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e58dbdb2ef84cb00c18f751d5131e6af SHA-1: 7b638200fae865a7ff3b857753bf77fd66c0b4a9 SHA-256: 61c5fefca9ea9d235677bfe23edeadfd4126d2445a4c3dda514edf4e73555b71
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing and link farm attack. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content or download sites. The presence of a 'utm_term' parameter in one of the URLs indicates a tracking mechanism, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8094

Heuristics 5

  • 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 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.
  • 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://garglob.ru/pbw?utm_term=subway+surfers+mod+application PDF link annotation
    • https://vabiganivasekeb.weebly.com/uploads/1/3/4/3/134339064/b041bde0aedf7.pdfIn PDF document text
    • https://domaruvujus.weebly.com/uploads/1/3/2/6/132683142/6582899.pdfIn PDF document text
    • https://vemosigexirapi.weebly.com/uploads/1/3/4/3/134387812/5f20ea77659b1.pdfIn PDF document text
    • https://lurotafimeka.weebly.com/uploads/1/3/0/7/130740015/5405325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_6069ca8c8d3d1.pdfIn PDF document text
    • https://sebexuvifezurob.weebly.com/uploads/1/3/4/8/134881690/mutebipuwebas_koputogipejojo_xekejowasisepir.pdfIn PDF document text
    • https://guvizetajujuwu.weebly.com/uploads/1/3/4/6/134617183/kazidepasuwurigonifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_605f786336237.pdfIn PDF document text
    • https://xofofafe.weebly.com/uploads/1/3/1/4/131438501/deripeta_nesoxuwe.pdfIn PDF document text
    • https://ronunute.weebly.com/uploads/1/3/1/0/131070227/5514591.pdfIn PDF document text
    • https://letemoxitaja.weebly.com/uploads/1/3/4/4/134475957/9162991.pdfIn PDF document text
    • https://daxugukixirujin.weebly.com/uploads/1/3/4/7/134739014/8669371.pdfIn PDF document text
    • https://rozogefeju.weebly.com/uploads/1/3/1/3/131398259/4987811.pdfIn PDF document text
    • https://zurejekivob.weebly.com/uploads/1/3/0/8/130813755/1f51623db3c3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380525/normal_5ff1860783ae5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gibuwodebu.pbworks.com/f/download_mencari_alasan_reggae_mp3.pdfIn PDF document text
    • http://pevaludim.pbworks.com/w/file/fetch/144910524/need_for_speed_most_wanted_night_mod.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/w/file/fetch/144589854/vuwetesikifixuzeresaw.pdfIn PDF document text
    • http://xigivesupi.pbworks.com/w/file/fetch/144590418/78169235114.pdfIn PDF document text
    • http://xugilip.pbworks.com/w/file/fetch/144486693/pagijawu.pdfIn PDF document text
    • http://zajozote.pbworks.com/f/nupemixoziwazegatos.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE918 5740 bytes
SHA-256: 9e4946600f3092fa64043554f3f4f08aea0429263e813791b447a90bd0d349af
font_01_sfnt_off0000fca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 12004 bytes
SHA-256: 65d28824ff9c3e5428a115d37d580cd5a24983dc2ce3a023f4892477ea650946

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