Malicious PDF — malware analysis report

Static analysis result for SHA-256 9807e54c4a16a49e…

MALICIOUS

PDF

80.2 KB Created: 2021-04-02 16:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 64b7da9b9a74cc97161a63ddfbc66d00 SHA-1: dc1b3ce67bf15f2b3b0daa96a6f0a8fe1a643292 SHA-256: 9807e54c4a16a49e2897a543e850da18007c9d5e9224413ebbafd74cd8239641
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 domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed 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://jacksth.ru/aws?utm_term=the+lightning+thief+book+chapter+4 PDF link annotation
    • https://cdn.sqhk.co/galemojubemo/gjgjGic/learning_music_notes_for_beginners_games.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/WPghs80/86356421281.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/7jbkMja/81661070759.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497348/normal_5fe316505de58.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/cara_menggunakan_minergate_di_android8bydv.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/jiuhjii/lego_superhero_coloring_pages_printable.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/zesusimem.pdfIn PDF document text
    • http://dsv-trening.ru/lowadefow0nb4j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409606/normal_60599c13b31f0.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://urott-hu.com/honda_motorcycle_parts_list_australilkyg8.pdfIn PDF document text
    • http://fbcopyright-center.com/vorofuwafavuxadakeji8ku7z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448984/normal_600db6a88bef2.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/tuxenipup/jekegimokaxapazatef.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/game_virtual_villagers_5_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/black_swan_nassim_taleb_review.pdfIn PDF document text
    • http://gekolutewubel.myartsonline.com/zixulanitomamex.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/newaruva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/603ff305-6bb1-4352-92a5-c7d4d285f5fd/befedewuxufojukolanutax.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/bottleneck_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e70dd959-7b6d-463f-b6a9-061f0cdd6f9c/do_dominos_pizza_come_with_dip.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_off0000fee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE7 5340 bytes
SHA-256: 3f51dbf00df7a579cf094c3b90e527f1f059cf5d326b524497286a83d047eb65
font_01_sfnt_off0001111d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111D 9548 bytes
SHA-256: b6d6342abe5502562b44db1d7c8cd14a90224b6e6882d5ff6d4772855db3b1b3

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