Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e243b628bed334e…

MALICIOUS

PDF

73.5 KB Created: 2021-03-24 11:03:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 32dd750184476142c5549b3fb94b91ac SHA-1: 55d9664ec472e6438ee16fa38373d09232602552 SHA-256: 1e243b628bed334ea71fd0ea4d9717b9e96d9fce0cf59c2c27142d6784ab0991
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 0.9993

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://lozipotod.ru/award?keyword=beginning+blends+worksheets+pdf PDF link annotation
    • http://romeita.fun/paris_casino_las_vegas_table_gamesabqu0.pdfIn PDF document text
    • https://cdn.sqhk.co/rosavuzezig/hcgcijI/1_32_slot_cars_for_sale_on_ebay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393486/normal_6007fa799554d.pdfIn PDF document text
    • http://momentshop.space/wotorekepinojepujakarpagzk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_602c0bf34c4eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484126/normal_603f688296b48.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/buffalo_wild_wings_menu_nutrition_informationkzfyg.pdfIn PDF document text
    • https://cdn.sqhk.co/rizuwevize/ijfdmSl/lebelumiximunutabonaxuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_604885d2d499c.pdfIn PDF document text
    • http://gloslides.com/deemo_switch_physicald5rii.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/z6ujfIT/kobofuxolowudiwogazefewov.pdfIn PDF document text
    • https://tigakivukabor.weebly.com/uploads/1/3/1/1/131164093/kifegonaveguf_linafomizekonul_dixukutabegepux_govog.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/ponexifovego.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/yigfqgh/vozisidaxikipexilinipameb.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/jQ8jghh/rikoga.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/49876c66-a9eb-4f0b-a762-2f9c6146f2fe/nikon_l35af_best_film.pdfIn PDF document text
    • http://lixutepojux.rf.gd/update_google_play_services_android_tv.pdfIn PDF document text
    • http://sojidalome.rf.gd/governance_and_public_policy_css_books.pdfIn PDF document text
    • http://bosirizowu.rf.gd/how_old_is_masoretic_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8a2c936-09ad-47c4-a407-3a658848c1b2/jiwakufonujezagilufur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fb77100-3368-4d0b-b22d-4def7ccddf6a/download_xbox_360_controller_for_windows_7_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faddf4d3-c659-4cff-8d27-17d393d0d1c3/risepewojixofatepepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/204c3900-66fc-433e-b9a6-14188090f3b4/how_did_then_she_was_gone_end.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_off0000e12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12E 5436 bytes
SHA-256: 5e2e244eedbf7e0be79c2908ec90356d86ee9d91c683be023f97b5077bc44619
font_01_sfnt_off0000f3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BF 10828 bytes
SHA-256: 665abbdcd03e987a0f4c90740d0fecd60df6cc987687d61b718db13fa797b462

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