Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a954bcf7bde6491…

MALICIOUS

PDF

68.4 KB Created: 2021-02-20 05:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4316de85c870e8e518ef6612cb161096 SHA-1: 295f8c4ce50a1b09218dc0914f631b2e39091181 SHA-256: 8a954bcf7bde6491721a216049ba3847dcad33f422bd9399c9199c5390072226
182 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure. Another heuristic indicates the PDF is a link farm hosted on disposable infrastructure. While no scripts were extracted, the presence of malicious links suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=is+animal+haven+a+no+kill+shelter In PDF document text
    • http://exemplpusj.com/ginileniraworokemaragnl1v.pdfIn PDF document text
    • http://alcozerox.com/laboratory_5_cell_respiration_answer_keyzm0uv.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/65428772766hrsww.pdfIn PDF document text
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/dde2e4b183.pdfIn PDF document text
    • https://xexajuxeleseg.weebly.com/uploads/1/3/4/5/134592224/venopopu.pdfIn PDF document text
    • https://buzapakamewogu.weebly.com/uploads/1/3/4/3/134366326/rafupadowimof.pdfIn PDF document text
    • http://bonifacy.site/soxunodebebaxutikvb6n.pdfIn PDF document text
    • http://soul-felt.com/pinarewirmf34.pdfIn PDF document text
    • http://atlas-copco.su/lebajupuwadazevukakudabaw96r9.pdfIn PDF document text
    • https://wumaviki.weebly.com/uploads/1/3/0/8/130874148/6e734962b53e8e.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/butuvidunemuzo.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/feborobegibew/mepodofofig.pdfIn PDF document text
    • http://vulekagezefodek.rf.gd/2448114983.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/amritvani_panipat_free.pdfIn PDF document text
    • http://tinafominur.epizy.com/49992014988.pdfIn PDF document text
    • http://wabelat.epizy.com/somosugeroletagokasuwara.pdfIn PDF document text
    • http://kuzadimizu.epizy.com/independent_contractor_agreement_template_colorado.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_off0000ffcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCC 4988 bytes
SHA-256: 57289f63baf0e8fb3e96ecb5b60ce8aa5474d75c9b2a9293ce3abd4ae61d4f97