Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb079ebcdae2839b…

MALICIOUS

PDF

83.7 KB Created: 2021-04-09 13:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 42f77216c877d28c7a6c90597809a8be SHA-1: c69965acdd5477ac25f2fffd1eda1cb99c2ef02d SHA-256: eb079ebcdae2839bdb2b031ae757d401a229157f46411534bc461544178712fe
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 0.9998

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://crophysi.ru/strik?utm_term=how+to+replace+primer+bulb+on+ryobi+blower PDF link annotation
    • https://cdn.sqhk.co/xubipoxeguza/igfkien/91084594134.pdfIn PDF document text
    • http://foodguideblog.com/tamilanda_tamil_stickers_wa_status_wastickerappsjnzb1.pdfIn PDF document text
    • http://vopezikililurab.mygamesonline.org/63417505546.pdfIn PDF document text
    • http://letgtma.bid/vitamix_5200_blender_professional-gradef35a1.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/Sycxij8/formula_1_live_updates.pdfIn PDF document text
    • http://specrazreshenie.com/848960454351oag7.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilogifuxe/QYjcKgj/vikeze.pdfIn PDF document text
    • https://cdn.sqhk.co/waxusuxagaki/uSjjmjb/block_craft_3d_download_free_pc.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/how_to_get_bigger_legs_with_bodyweight.pdfIn PDF document text
    • http://tazanup.mypressonline.com/79420201567.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/e4badb10-e02d-46c0-9f16-4854772cc8d9/assassins_creed_syndicate_script.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/prochlorperazine_5mg_tablets_patient_information_leaflet.pdfIn PDF document text
    • https://37e79482-e567-4eff-b449-6ea9b90d4679.filesusr.com/ugd/cff0cd_4d4ab44470d04528a676fb532d68f7f7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c520a4d-b0c5-45ad-ab57-d22f3dfcba72/59610577366.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_a4178c1f98d04cb3aaeb8a32c2c245ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/first_grade_math_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef51835e-9b21-4c78-9680-6f5d029cd113/69493033260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f977da-9103-496b-8a8f-c6a08e9f618b/mobile_moped_repair_near_me.pdfIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_884c8444080a499ebaf9b747872ab521.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_off0001085e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085E 5196 bytes
SHA-256: f3c9f96ee1edf448b44c3ec085accd9c95c8647c857c61fd1a78d5924a1e63bd
font_01_sfnt_off00011a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A05 11696 bytes
SHA-256: 23041b74bcd73ab8c136d9d9c2dba08ee039b87a02d068d2c95420f6026e84f5

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