Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4be5bd847c2d22d…

MALICIOUS

PDF

80.5 KB Created: 2021-04-02 01:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: eb7596d79edcb34340bc5a9c5ae3bf5b SHA-1: 3989a4cf37a94813b4324458253101d539881569 SHA-256: d4be5bd847c2d22dd684bb907eaabf65e3fc4406f7cadd668a1f84ead73067e0
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The document body, though partially corrupted, suggests a lure related to a movie title, which is a common tactic for phishing or malware distribution. The presence of numerous external URIs and link farm characteristics further supports a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=viaje+al+centro+de+la+tierra+pelicula+completa+en+espa%25C3%25B1ol+latino PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460471/normal_5fe422e35024f.pdfIn PDF document text
    • http://ipoteka.net/hungry_shark_apk_apkpuremmtkn.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/holmes_institute_formsvvc7g.pdfIn PDF document text
    • http://osmosiotzs.fun/xekiluvr86gw.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/36998439725vlm99.pdfIn PDF document text
    • http://fanuvazav.scienceontheweb.net/how_does_a_river_runs_through_it_end.pdfIn PDF document text
    • http://pajalegi.iblogger.org/pironobula.pdfIn PDF document text
    • http://sberbank.services/wagitabuvigiwesawovexonawgfs.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455642/normal_5fd7482ca7315.pdfIn PDF document text
    • http://burutevopu.iblogger.org/fallout_4_bobblehead_mod.pdfIn PDF document text
    • http://winoorama.space/keliwelukefasupet9xsh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jilewotixa.epizy.com/how_did_christianity_spread_across_europe.pdfIn PDF document text
    • http://fugazite.epizy.com/beauty_tips_bangla_video.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/boko_haram_in_cameroon.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_off0000f8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C1 5472 bytes
SHA-256: f5a1211a9fac60f599e227963f7c46c67459f33a2815739f14378957d8434cba
font_01_sfnt_off00010b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0F 12096 bytes
SHA-256: 6342e0bd92ef41fb9d59102633e7c3abb0ebe810f292da583b86942c7a11d42d

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