Malicious PDF — malware analysis report

Static analysis result for SHA-256 a820290b5e8cc878…

MALICIOUS

PDF

75.8 KB Created: 2021-05-09 16:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1df6547708ef994d03c995f3589a61ff SHA-1: 918f8f21d27b320b0d6c2e013c903c3eccc53ceb SHA-256: a820290b5e8cc87885af4bcdd45773fbb073103171d2ed164472d1420d6ef971
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning tactic to attract unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jacksth.ru/strik?utm_term=how+to+fix+sunbeam+electric+blanket PDF link annotation
    • https://cdn.sqhk.co/jomonufo/gS8cWhg/ghost_rider_wallpaper_hd_download.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdfIn PDF document text
    • https://gofadoden.weebly.com/uploads/1/3/4/6/134615513/4080402.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449205/normal_5ff4e024261c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366625/normal_5fcdc309725e7.pdfIn PDF document text
    • https://litufefanim.weebly.com/uploads/1/3/4/9/134901191/4610234.pdfIn PDF document text
    • https://vokuduvalabi.weebly.com/uploads/1/3/4/5/134502282/6643995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5fdc435a4d211.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/guxosa/12022957033.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/wazeditifetafamibikitifu.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/45607539963.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/cyberpunk_2020_blackhands_street_weapons.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/basic_instinct_full_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/kunipimonatajoviw.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/4266114645.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/bmw_e46_330ci_auto_or_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/77535852821.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/company_of_heroes_2_guide_wehrmacht.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/40369511030.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_off0000eae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE6 5352 bytes
SHA-256: 37386d991857f6b16080aba02411a3507ce729a22a7b78a1937db5fb2fb3c742
font_01_sfnt_off0000fd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1A 10912 bytes
SHA-256: 76e77368086fa64a4550326f12f6475bcb68cd00b6058de9aca99a1e32b76868

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