Malicious PDF — malware analysis report

Static analysis result for SHA-256 214b74f839920bf3…

MALICIOUS

PDF

80.1 KB Created: 2021-03-11 06:38:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 82f1f31105bf5e520b621e4b171762be SHA-1: 00249131f1c21193a6221d79ce78303e6068dd1a SHA-256: 214b74f839920bf38e9c4991b74ee2be1720b70ae9e8deacef631dca9ab39459
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy, likely to obscure the true malicious intent and distribute phishing or malware. The presence of external URIs suggests an attempt to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/wix?keyword=hunter+x+core+irrigation+instructions PDF link annotation
    • http://nosatines.mypressonline.com/sharp_aquos_quattron_will_not_turn_on.pdfIn PDF document text
    • https://cdn.sqhk.co/lapitobexeva/dhelX2R/star_wars_asteroid_worm.pdfIn PDF document text
    • http://kaboliwup.mypressonline.com/fractal_fx8_mark_ii_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407086/normal_601280b132c97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447273/normal_6009f75b46651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_6014913edbdff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456999/normal_5ffe4f491e7fd.pdfIn PDF document text
    • http://wikowezenitezo.medianewsonline.com/sing_hallelujah_to_the_lord_chords.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_602ffaaf020b5.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/chfhfie/ps_remote_play_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406455/normal_5feef236d570b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365541/normal_5ff25ce25618f.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/ejijfib/barbie_dreamhouse_adventures_full_cast.pdfIn PDF document text
    • http://mevakimuvu.mypressonline.com/75098353771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427509/normal_5fd836f873071.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484609/normal_5ff407649befa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://golinab.rf.gd/dyson_dc58_handheld_vacuum_cleaner.pdfIn PDF document text
    • http://watonorobawar.rf.gd/45094837269.pdfIn PDF document text
    • http://kazibejega.epizy.com/microsoft_flight_simulator_2020_release_date_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/teletubbies_theme_song_piano_sheet.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/easy_soft_pastel_drawings_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/xorezefuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/free_credit_report_equifax_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/sekupetawe.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_off0000fdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAC 4964 bytes
SHA-256: 6d53cd4d2918e949c35f5c96aba9f2c82a336ba2a042d4f3ac15c2fd70694707
font_01_sfnt_off00010ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA1 10608 bytes
SHA-256: b6b6b8e48bf130c342dc958946ba52f33928cba5b0c25c72f0576051740c6d7d

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