Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc7f0f38e6afc9e4…

MALICIOUS

PDF

76.1 KB Created: 2021-03-04 14:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3de509976ef520cf41c9f86596af0b18 SHA-1: ecaa09b8a20d003679b9b601c5b1529271ed6112 SHA-256: bc7f0f38e6afc9e4f06a9a3f06cf9f808dbb067f63f4c9851a5247102781aafb
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs, with a significant number pointing to disposable hosting services, suggesting an attempt to distribute malicious content or engage in phishing. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely contributes to the redirection or obfuscation of these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://maypoin.ru/strik?utm_term=how+long+is+navy+dive+med+school PDF link annotation
    • https://cdn.sqhk.co/toxotunem/idibihj/entergy_new_orleans_la_address.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/jeBkidZ/wazixemefeloti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_600f4a75ee723.pdfIn PDF document text
    • https://xanerenidijuv.weebly.com/uploads/1/3/0/7/130739333/8580278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_6009af96ee0d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465000/normal_6032ab2ba79b5.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/Aiaigjj/velepunogoki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421474/normal_5ff46130b77ba.pdfIn PDF document text
    • https://pumoguviponurin.weebly.com/uploads/1/3/4/7/134773216/e7c977.pdfIn PDF document text
    • https://cdn.sqhk.co/xanovika/IT1ejfk/88271545438.pdfIn PDF document text
    • https://bevikutemo.weebly.com/uploads/1/3/4/6/134648684/tuvip.pdfIn PDF document text
    • https://govuxedosuwiwur.weebly.com/uploads/1/3/5/9/135962540/9a32ead.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/s4FLdja/99802117952.pdfIn PDF document text
    • https://tekevifumufov.weebly.com/uploads/1/3/0/7/130739519/4434b5df6ef6ea5.pdfIn PDF document text
    • https://mifoxafakefan.weebly.com/uploads/1/3/0/9/130969175/33cdfcf8e7b2c.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/iliezje/panuwimepebi.pdfIn PDF document text
    • https://gijowazav.weebly.com/uploads/1/3/4/0/134097260/nodetuke.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/jyibFvq/29809115704.pdfIn PDF document text
    • https://cdn.sqhk.co/tedogegez/hcgficT/1116758192.pdfIn PDF document text
    • https://watuluvijigu.weebly.com/uploads/1/3/3/9/133997483/bibotikavudidi.pdfIn PDF document text
    • https://ditixalopu.weebly.com/uploads/1/3/1/4/131410538/200c6da8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000edd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD9 5472 bytes
SHA-256: 6e4a42c14a809a37c5ad169cd97bb99d5b0c0823a34f7172e8ecd6b96a78b4df
font_01_sfnt_off00010075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10075 10124 bytes
SHA-256: bf77f1f78d66751086df13bf0b69e8fcb4a2c9fce066fd4803dd8148e9dcdf76

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