Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68204ad5db5906d…

MALICIOUS

PDF

78.7 KB Created: 2021-03-09 20:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 781d9d0e4cf6ea4fd6175fef36d6a7a8 SHA-1: a1ada79591e2b424a61a50533344dbc729469941 SHA-256: e68204ad5db5906d86733811d24cdddad07b2bca512eb027c257d02bef47d5cf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and potentially malicious content, as indicated by the ML classifier and ClamAV detection. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to create a link farm for SEO manipulation or to host malicious content. While no scripts were explicitly extracted, the presence of many external URIs suggests the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/wix?keyword=binary+and+polyatomic+ionic+compounds+worksheet PDF link annotation
    • https://cdn.sqhk.co/gubujurit/hdhjHgj/subway_princess_runner_2.pdfIn PDF document text
    • http://zoomita.fun/34093403103r33sm.pdfIn PDF document text
    • http://copyright-infringement.business/860822100862lu7u.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/jfgX8jj/treasure_hunter_runescape.pdfIn PDF document text
    • http://bella24.xyz/logic_pro_x_tutorial_italiano5h64x.pdfIn PDF document text
    • http://byt-upak.ru/fixiwakebavudeluvvw8f.pdfIn PDF document text
    • https://cdn.sqhk.co/gigepiwej/inigVjg/36887974408.pdfIn PDF document text
    • http://small-italy.space/assoluto_mod_apk_1._26._2em6mt.pdfIn PDF document text
    • http://thepropheticapp.com/48635998179aew9y.pdfIn PDF document text
    • http://detonic-ordina.website/cuando_se_puede_viajar_a_colombia_desde_espaa0fd5t.pdfIn PDF document text
    • http://verification-help.com/5352331725u41ap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c8355c2-924b-4133-aba0-0a7604d66315/wijudori.pdfIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_5fb5899c1a6344edaf46eaa5dbe1824d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/40593ce2-9b2d-4537-ab8f-7a5e31a883c6/shark_euro_pro_x_sewing_machine_9110.pdfIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_4c24110d14304bdd8e6b4170e0a3aef5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce4f770-8be6-4b29-babb-343f88bdd501/sony_explode_boom_box.pdfIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_d94d0d43a0a643d4918ca459bddc28e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee750b84-a839-4427-bf7e-55d2e40c3e6d/what_is_the_theme_of_the_hunger_games_book_1.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_off0000f739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 5620 bytes
SHA-256: 03de2f0e58cd2a4d8975495eafcbe7dec1168f8eb0a38e3a54db60b5b90f53a2
font_01_sfnt_off00010a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A41 10420 bytes
SHA-256: 04a50ea453f38dcacd877fe358adca02be60ab6daa0b6370bb9366067f612180

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