Malicious PDF — malware analysis report

Static analysis result for SHA-256 bace7eeea95d0e8a…

MALICIOUS

PDF

61.3 KB Created: 2021-03-01 08:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8433a3cae10e4b0b07ea06377049a452 SHA-1: 99690bfbf2be047b9dd9400fb1adc632f7e62cd3 SHA-256: bace7eeea95d0e8a5d7f905fef14059bbd4b839f41906f8cd57e08f6738da28d
242 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded links, many of which point to disposable domains or known malicious redirectors. The heuristic firings indicate this is a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature, likely as a downloader or redirector for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8623

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://yafferge.ru/award?keyword=united+colors+of+benetton+united+dreams+aim+high+perfume+review In PDF document text
    • https://vajilitoseg.weebly.com/uploads/1/3/1/4/131437648/2265097.pdfIn PDF document text
    • https://cdn.sqhk.co/migukosodaza/ihYnjg1/catan_piece_holder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411480/normal_600f72e40436d.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuwatipo/iidqXie/vuwanesekanodugologawixa.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/1LjieC2/90914825208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_603970ba03cec.pdfIn PDF document text
    • https://takadoturig.weebly.com/uploads/1/3/4/1/134108809/raseponukodozorupu.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/jutisonaxuboruluju.pdfIn PDF document text
    • https://cdn.sqhk.co/melivetipi/i5jnggd/rokalesozokulelolivok.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/aRiaQc7/tekuzesimefatowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_60153db86665d.pdfIn PDF document text
    • https://cdn.sqhk.co/gagobuniponi/hgjjggX/progress_of_project_mod_apk.pdfIn PDF document text
    • https://duxubekuzew.weebly.com/uploads/1/3/4/5/134506612/nebimexusofi_poxowimojin_nabin_pekifokowabujeg.pdfIn PDF document text
    • https://cdn.sqhk.co/gokarunedod/Ugdidjc/shark_bite_force_vs_human.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379476/normal_603c259e42376.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/ij0icie/71222883451.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/gidibesuxi/tawojigixewidamavoliva.pdfIn PDF document text
    • http://jilevatawew.epizy.com/the_sectional_anatomy_learning_system_free.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_off0000e58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 5852 bytes
SHA-256: f8b56912d3eab8820efe47a858c5be533128b2e81086eb5cb7b5300ef0c908f1

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