Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fecc66947daf00a…

MALICIOUS

PDF

73.8 KB Created: 2021-02-09 15:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 68d0202ef17d1cc9c0e82298baa7af77 SHA-1: 15a3a581b7bc8daf47b4af24c5c4cbd593ab3f00 SHA-256: 4fecc66947daf00ab89d43e0305565a74bae83f264aa63dac978a16eec0afea7
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, specifically by presenting a search query related to 'google sheets authentication java' to entice users. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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/wb?keyword=google%20sheets%20authentication%20java PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488101/normal_601b520ebd22c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447878/normal_600691dc0090f.pdfIn PDF document text
    • http://tuimag.ru/tujedukoparuvekeqjiri.pdfIn PDF document text
    • https://rozigakix.weebly.com/uploads/1/3/2/3/132303329/lolani_labakunepe_fisexujilo_lemuw.pdfIn PDF document text
    • https://cdn.sqhk.co/mozoposowi/haUACic/fake_video_call_cartoon_cats.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/1578e0f657.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/chcr556/sisters_oregon_fire_damage.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/jhcvice/89374026800.pdfIn PDF document text
    • https://cdn.sqhk.co/rowavarop/ejgjhYg/32872887634.pdfIn PDF document text
    • https://devuxitimon.weebly.com/uploads/1/3/4/5/134596282/zuguxolitezaxaguva.pdfIn PDF document text
    • https://cdn.sqhk.co/tolebilu/egf7Pjj/14021392841.pdfIn PDF document text
    • https://juxilejaguzu.weebly.com/uploads/1/3/4/4/134404551/pagubiw_deboxapi_lebeto.pdfIn PDF document text
    • https://seruborakumew.weebly.com/uploads/1/3/4/8/134849990/zovusa.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/nifitixof.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/6194545.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fipaliwabalutu.rf.gd/57437234880.pdfIn PDF document text
    • http://jigigapapidafe.epizy.com/facsimile_transmittal_sheet_meaning.pdfIn PDF document text
    • http://gagelenobom.epizy.com/27849846414.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 5132 bytes
SHA-256: 5ab536513b16fef56c3bc9a301b537fcb92121d0addee836c8fb081e988c7354
font_01_sfnt_off0000f3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B8 11180 bytes
SHA-256: 3c23728c7cf6df3c72cff35fbae5613d72dd15dca41d23301503aaa786287538

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