Malicious PDF — malware analysis report

Static analysis result for SHA-256 68fe20eee01ae762…

MALICIOUS

PDF

73.9 KB Created: 2021-02-09 19:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6b6395f981876d51292e8b982e3c2376 SHA-1: 202b03bb62aa455337a26af3361efec71c9a254b SHA-256: 68fe20eee01ae7628b25957639115fc393b817c1cb0661c3d05b83210ae69c24
186 Risk Score

Malware Insights

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

This 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, many pointing to disposable hosting services, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites, as evidenced by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=cholesterol+guidelines+aha+2018 PDF link annotation
    • https://kegewibenufugix.weebly.com/uploads/1/3/2/6/132682471/002b37de0ee2.pdfIn PDF document text
    • https://fonevufaj.weebly.com/uploads/1/3/4/4/134444269/6389430.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/9hc7e5F/zumuzopenebuvonuvowaleso.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/Z8Eihhi/reraw.pdfIn PDF document text
    • https://cdn.sqhk.co/mibaforetu/bf66FfP/95573585564.pdfIn PDF document text
    • https://cdn.sqhk.co/mixekuwuvo/Fhi3zhj/22172314744.pdfIn PDF document text
    • https://cdn.sqhk.co/lapitobexeva/uFichdJ/dopasebiferebotatopiregid.pdfIn PDF document text
    • https://nifiwaratobiwe.weebly.com/uploads/1/3/5/3/135346776/kivasuja.pdfIn PDF document text
    • https://dakusarifupufa.weebly.com/uploads/1/3/3/9/133997242/fazaza.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/h2igzJj/27497164573.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/fCgfheO/niwenimijisaxufowofopoga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nebejobibaveb.epizy.com/daily_mail_showbiz_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/network_adapter_for_sony_vaio_laptop.pdfIn PDF document text
    • http://jimotomalugeji.rf.gd/kutifenuzoriwaterupesax.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/best_non_conforming_golf_balls_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/20348984093.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/big_little_farmer_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/will_bleach_get_blood_off_white_sheets.pdfIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 5512 bytes
SHA-256: 4e15df754c7cf0b0a7495cbf4b88f9137f638b33410d63cfb705e386186b468d
font_01_sfnt_off0000f6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E3 10304 bytes
SHA-256: 5a3ccd2663ff7439c01cec4a1fb905ebfb7d7ed35fe306bd9c6cc84a86ccb47b

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