Malicious PDF — malware analysis report

Static analysis result for SHA-256 70765d4057308713…

MALICIOUS

PDF

74.4 KB Created: 2021-02-15 05:15:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 64e30264ce1dc0670fb95bd4d9ef041a SHA-1: 5662d340187ff6d3889158bb8053277bcfb7997a SHA-256: 70765d4057308713832f95dcc8c51db69ff909c2ae02eae75f3e73338112e35a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. It contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of external URIs and the overall structure indicate an effort to redirect users to potentially harmful sites.

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 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://bologen.ru/123?utm_term=destiny+2+infusion+2020 PDF link annotation
    • https://cdn.sqhk.co/tovipovo/frZijgd/98098571415.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/HidhcV6/warlings_armageddon_hack_version_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380070/normal_5ffab6003b8c9.pdfIn PDF document text
    • http://form-copyrightservices.com/lotubatowegexowanagijozapgalg3.pdfIn PDF document text
    • http://rm-swis-mine.com/safari_rv_brochure_archivejyc6q.pdfIn PDF document text
    • https://cdn.sqhk.co/turogepufe/iaJ5Cje/ziraditudoligufele.pdfIn PDF document text
    • http://flash-sar.online/kennedy_space_center_visitor_guidewjrgz.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/qVgjShe/battle_of_steppe_napoleonic_wars.pdfIn PDF document text
    • http://help-bluebadgecenter.com/belavirte5m.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/tesapibebujep/centos_6._4_iso_32_bit_full.pdfIn PDF document text
    • http://vabizofolimise.epizy.com/nipovegujapumafupi.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/call_recorder_android_9_without_root.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/34446557074.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/tablayout_with_fragment_viewpager_android.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_off0000e804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE804 4796 bytes
SHA-256: 005476ea46b49905dce6c5e1beed12f99b6ce40971d231ec2512d1ec7af247a4
font_01_sfnt_off0000f885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF885 10576 bytes
SHA-256: ac6fe4762f54e75bdffb53eccac019a886610c27fcb9ba6a851354d75a04f908

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