Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed42664d4dea28e8…

MALICIOUS

PDF

72.1 KB Created: 2021-01-29 00:03:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7e4b63aa8e20a86a14324ba3258c051b SHA-1: ec773cf86d5116b684f3fd43078e3f9120bef9d2 SHA-256: ed42664d4dea28e89a4e3a37d8ae15db8f9ce57fa29e695ad4e1259a8b144798
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/123?utm_term=thomas+finney+calculus+11th+edition+solution+manual+pdf In PDF document text
    • http://zeraseb.66ghz.com/bhangra_paa_le_song_ming.pdfIn PDF document text
    • http://xagimovuroj.22web.org/arithmetic_and_geometric_sequences_worksheet_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5fd8b5021250c.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/2091199.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/risalenefazozo/new_audio_song_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/forrest_gump_suite_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/lawimosewadifiz.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/free_rsvp_postcard_template.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/funaratovufo.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/game_brain_genius_for_pc.pdfIn PDF document text
    • http://fevepapowiwed.epizy.com/tijixukaguloxidenapibu.pdfIn PDF document text
    • http://doxewadafexe.rf.gd/following_directions_worksheet_for_elementary_students.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/xasesojujerusegotej.pdfIn PDF document text
    • http://nesitojogosew.epizy.com/azure_data_factory_v2_formatdatetime.pdfIn PDF document text
    • http://goseletew.epizy.com/40102227249.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_off0000dff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF2 5400 bytes
SHA-256: be9451592e0eb384e5a3a229c0e3fe272847d0a2b90ec00f1c2e864b45441400
font_01_sfnt_off0000f23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23F 9856 bytes
SHA-256: f1c9a4075dce4ae615ae57f9ecc80e2ad4111d1a375c3894626e3654ffdf4b20

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