Malicious PDF — malware analysis report

Static analysis result for SHA-256 977fe4da90b922e5…

MALICIOUS

PDF

89.8 KB Created: 2021-03-31 09:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 16ce688cfe4bb6dc812dde7b32fba54b SHA-1: 20f50fb0ef5e6ceff9b17894ae6b7704c01893ac SHA-256: 977fe4da90b922e58e3271a62dc60237680558355e041b24598d49f7c73023d3
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or redirection scheme to deliver malicious content. The document body, though heavily obfuscated, contains keywords related to the embedded URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://jottigo.ru/award?keyword=nonlinear+dimensionality+reduction+lee+verleysen+pdf PDF link annotation
    • http://kodepovorivapi.mygamesonline.org/sop_akreditasi_puskesmas.pdfIn PDF document text
    • http://joweponula.mywebcommunity.org/microsoft_excel_2020_vlookup_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/lhcrNih/36920467307.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/70914060958.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvuwisarov/dcLicib/roly_poly_monsters_level_2-_10.pdfIn PDF document text
    • http://logunesunoj.medianewsonline.com/vitamin_b12_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vozupowo/bUjf7ja/buzzer_sounds_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_9ccbeb8e6af743648d09dc98f3cf5e72.pdf?index=trueIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_be8e059bac6c42729248d36586cdf8a0.pdf?index=trueIn PDF document text
    • http://sufixis.myartsonline.com/achievers_magazine_english.pdfIn PDF document text
    • http://zizenatoxu.myartsonline.com/56120083669.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/nukabezipakuwuvimevaralag.pdfIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_25bd09969b9a4ebeb3698d10806aa6d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/jumilimipusi.pdfIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_441adb1381e1485fa8452e90db8f9627.pdf?index=trueIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_2d6a9500036c4a40879c0d2fc5dfc97e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/24010086091.pdfIn PDF document text
    • http://majezomisi.myartsonline.com/amish_tripathi_books_in_malayalam_free_download.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_52e91a3bdcbc4468942e822a430a76aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/zuseviv.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/99070864431.pdfIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_81d689222a8e40da82acd16c6717e6cb.pdf?index=trueIn 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_off00011f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F01 5432 bytes
SHA-256: beaf408358fd9a2b156b2303305bf9be9ad0b441ab5469e83eda110928371738
font_01_sfnt_off0001317f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317F 12576 bytes
SHA-256: 6b3f844ef298cae981f10dcecc3ef7d7320fa7a59731e487739c1107ddfa0ed2

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