Malicious PDF — malware analysis report

Static analysis result for SHA-256 24be85574dbfbb84…

MALICIOUS

PDF

96.9 KB Created: 2021-03-16 23:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 609647822caaf9d3344172178521473c SHA-1: 5b4860b5ec9dddedf4654f98144333471c273791 SHA-256: 24be85574dbfbb84276bc23e00cefa9087a677b90b47ab45c7619ff636df326f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/award?keyword=intrinsically+conducting+polymers+pdf PDF link annotation
    • https://lefizedut.weebly.com/uploads/1/3/2/6/132681647/bukosuxine-rubes-detasasi.pdfIn PDF document text
    • https://kajemawukik.weebly.com/uploads/1/3/4/5/134589491/3994809.pdfIn PDF document text
    • http://jesubenodewopob.22web.org/how_to_pair_microsoft_keyboard_with_new_dongle.pdfIn PDF document text
    • https://cdn.sqhk.co/nizufalagef/ecncfxW/lobomezavodatewika.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/tcp_ip_layers_and_their_functionsvo5ux.pdfIn PDF document text
    • http://flowerport.shop/258186830507kfyy.pdfIn PDF document text
    • http://ogranicbio.space/payday_2_custom_heistysa7j.pdfIn PDF document text
    • https://roguvajodanuk.weebly.com/uploads/1/3/1/3/131379692/f7c29d7.pdfIn PDF document text
    • https://neninilez.weebly.com/uploads/1/3/3/9/133986457/matirazuvetufuj_zizim.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/iMPxccz/korezuwotadubatofelegomof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451044/normal_604492c1117a6.pdfIn PDF document text
    • https://cdn.sqhk.co/guviterolovu/hcAhdli/basic_marketing_research_4th_edition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416322/normal_5fde140f34230.pdfIn PDF document text
    • https://zokibiruxe.weebly.com/uploads/1/3/5/3/135326092/5bf71b9c2841f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477916/normal_6036c187ba0ff.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/84352565544ric0z.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/1526eeff-a730-466b-a44b-b9959dd772a4/7745840394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc6f562-8696-45e5-af47-5f73f9892068/honeywell_quietset_white_fan.pdfIn PDF document text
    • http://wesovipimamino.epizy.com/steelhead_fishing_guide_michigan.pdfIn PDF document text
    • http://susejukeb.epizy.com/73096496593.pdfIn PDF document text
    • http://vasenatisa.epizy.com/cheat_engine_pc_windows_8.pdfIn PDF document text
    • http://satonavuka.rf.gd/85494929852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dec3a2e-2fec-46cf-ac3b-bbc2b85bd5fb/should_i_buy_a_george_foreman_grill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e2a18aa-fee1-4e35-8711-78a0550c6732/what_are_good_starches_for_diabetics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd7ca6ac-e4fb-4695-8209-8a5fcf93d84e/play_the_game_of_life_online_with_friends.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_off00013b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B77 5512 bytes
SHA-256: 35916d5b701a4a2ee97ab6c8c8db0c9e9814be21995093f9d5b03e1f081863d9
font_01_sfnt_off00014e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E2D 11604 bytes
SHA-256: 22fd3b7f4cd9f9462a374c56cbd02eb0deae5000255712d50cf44fc195e30e91

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