Malicious PDF — malware analysis report

Static analysis result for SHA-256 541087757f3baca2…

MALICIOUS

PDF

68.1 KB Created: 2021-03-14 17:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e86355a314307c3e6456247252ca9cfe SHA-1: 1850d30985b367ab0b32f23e30cbe855cf9e7d23 SHA-256: 541087757f3baca257296096075d1f63274db205e191995b35426e8d8eb7fd37
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or redirection to malicious content. The document body, though partially corrupted, suggests a lure related to 'thermal and sound insulation materials'. No scripts were extracted, but the presence of numerous external URIs points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8464

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/award?keyword=thermal+and+sound+insulation+materials+pdf
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/1304657.pdf
    • https://static.s123-cdn-static.com/uploads/4369927/normal_5fe2b8a6f118c.pdf
    • https://cdn-cms.f-static.net/uploads/4382197/normal_602141dbd896c.pdf
    • https://static.s123-cdn-static.com/uploads/4497346/normal_5fcc5382436ea.pdf
    • http://wukezodunoj.22web.org/bionaire_oscillating_ceramic_tower_heater.pdf
    • http://hesap-al-sat.com/lisan_ul_quran_malayalam_guide_7w89ks.pdf
    • https://gidelusibi.weebly.com/uploads/1/3/4/0/134040719/moziwifopev.pdf
    • http://naturaleone.space/786646730086zf04.pdf
    • http://hocostyle.ru/jazutu24cgj.pdf
    • https://static.s123-cdn-static.com/uploads/4454055/normal_5ffb420ba624d.pdf
    • https://cdn-cms.f-static.net/uploads/4384308/normal_60423498b2af7.pdf
    • http://guwelureg.22web.org/zekanokesa.pdf
    • https://static.s123-cdn-static.com/uploads/4468819/normal_5fdd2bf39333a.pdf
    • https://mejojesakawevud.weebly.com/uploads/1/3/1/4/131438193/bogefifixebef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/purixifusipelid/ronijanowuzexajo.pdf
    • https://s3.amazonaws.com/xonobijikivo/80462873397.pdf
    • https://s3.amazonaws.com/luramamelolem/a_que_edad_se_puede_empezar_a_tomar_colageno.pdf
    • https://s3.amazonaws.com/fokapikow/6577702206.pdf
    • https://s3.amazonaws.com/lososimap/age_of_empires_ii_the_forgotten.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2e9.bin
f1b07ce5393b3ff4d5f50e1d4ec46eee480ef76eae868426a9315657913f44fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 5228 bytes

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