Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7d5598d7d46bad…

MALICIOUS

PDF

80.2 KB Created: 2021-03-18 06:53:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e92b84931c5efd715c40408c3cb7e2af SHA-1: 98355bf1fc98de48e2a1ab0cd38d442b118b169f SHA-256: cf7d5598d7d46bad1820a4ac2f4e57481fa3c7d3c57a8f2bf2725239f516c111
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 0.9991

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/strik?utm_term=grading+smarter+not+harder+book+study PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426832/normal_600c7a368a374.pdfIn PDF document text
    • http://rasprodavaika.ru/76917607381vfetp.pdfIn PDF document text
    • http://garantiya62.ru/rejesugiwuq356f.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/jesajopuzj75x5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470677/normal_6030f4e1222e2.pdfIn PDF document text
    • http://disconto50.info/nowobatukukawiweudbvi.pdfIn PDF document text
    • http://shishkin-seed.xyz/z_for_zachariah_book_vs_moviehf8la.pdfIn PDF document text
    • http://grigolia-studio.ru/kundu_medicines6qwk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423757/normal_604ad656f4179.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/je36v0z/kezawonubunifobat.pdfIn PDF document text
    • https://cdn.sqhk.co/fodibaniwe/I7jeha0/41997601187.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/mjggiU9/methode_d_analyse_swot.pdfIn PDF document text
    • http://pitushok.fun/bigidaz4d6ge.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/jjr94yH/90919352607.pdfIn PDF document text
    • http://pollsexpert.com/vazufo5h4me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/31bd4bc3-8f36-4668-9dec-af79bff29199/rhetorical_questions_in_julius_caesar_act_3_scene_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb54a6d9-7075-4931-9167-84ddf1aff469/how_to_adjust_pressure_on_a_simpson_pressure_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/audio_note_dac_1_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/juwuregolujifik.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/snaptube_app_for_jio_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bc681da-f606-4afe-94c7-7ecf4f2153da/the_greatest_salesman_in_the_world_in_hindi_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ddd4976-bd5d-4ae3-8a0e-16fd9f9b1c6d/dell_latitude_e6410_battery_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fb09524-65e0-40c5-a5be-738ae1e27e52/lusuwibazaladojede.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 5424 bytes
SHA-256: f3af38c41ff2d51a84a52ecc0cbc5aaa5ab2003821f83374575b9f6812888cef
font_01_sfnt_off00010029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10029 10824 bytes
SHA-256: 4d33fb01106a70f827ff90062934d98d05838b8ba2a358db4f9c686232870e0a
font_02_sfnt_off00012538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12538 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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