Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4cb654e8cf46b0f…

MALICIOUS

PDF

73.1 KB Created: 2021-03-06 19:00:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 13f95c9d79d886e7b914c3fd47715e17 SHA-1: 792f0041cac82df153a40c85df03961775d7e22d SHA-256: f4cb654e8cf46b0f62786e98a8b6a29ef0eee1ffa58e28e59b3f0b3fa960cad6
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://ponafet.ru/award?keyword=english+grammar+in+use+5th+edition+amazon PDF link annotation
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/ruvasubasuwo.pdfIn PDF document text
    • https://gidiwukos.weebly.com/uploads/1/3/1/3/131381706/184662.pdfIn PDF document text
    • https://cdn.sqhk.co/migefareg/Ejehhij/fish_live_wallpaper_hd_download.pdfIn PDF document text
    • https://bewotababuruga.weebly.com/uploads/1/3/1/1/131163836/bd9e5759009.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/eEhdgiM/free_online_spanish_to_english_translation_websites.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/YdihNhd/virus_games_unblocked.pdfIn PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/2728842.pdfIn PDF document text
    • https://vafopizinenited.weebly.com/uploads/1/3/4/4/134480139/gijajikakaj.pdfIn PDF document text
    • https://fozaronu.weebly.com/uploads/1/3/5/3/135349809/0928756.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/toniseligiwuzux/lazokatidafepigefilifat.pdfIn PDF document text
    • http://lafugigolemetuk.rf.gd/getting_mean_with_mongo_express_angular_and_node_second_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/how_to_turn_off_adt_smoke_alarm_beeping.pdfIn PDF document text
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_f3a3b281fc1c44e791a450805c3028cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/las_tecnologas_de_la_informacin_que_son.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/36202212264.pdfIn PDF document text
    • http://rexivire.epizy.com/10347886789.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_fb893a7ee3df43db80271ca0d7fd56d7.pdf?index=trueIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_c27a36a672b842659a1df4de5247c34d.pdf?index=trueIn PDF document text
    • http://bosudavukimuto.rf.gd/39261298187.pdfIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_91e562a3288d453ea3c2a0dec7486222.pdf?index=trueIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_be5f3053fa4247379fa68e599f82a951.pdf?index=trueIn 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_off0000de58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE58 5372 bytes
SHA-256: 4d12b51e86e50b94687e4b76b2f1208498840da001046500eac7f1ce4f253136
font_01_sfnt_off0000f07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07D 10864 bytes
SHA-256: 1852349361f19653dc3c85508795f914936b3e6aa512ac2a76281054637b96af

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