Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e5f4dd488c343d…

MALICIOUS

PDF

74.2 KB Created: 2021-03-14 08:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0e7c4aa90949e0727e598caf8057bcb SHA-1: 975770d8ef3649ce5f44c10f8831f2e84acc0a61 SHA-256: 89e5f4dd488c343d22dff9a13b337dd9b2ca96ee1894f4936d61e2a2249fd39d
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 0.9990

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://kuzutuzo.ru/123?utm_term=calendario+annuale+2021+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387054/normal_5fce11fb750a5.pdfIn PDF document text
    • http://unreguezff.rest/kanetamawe8rhxt.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/hhqgfPD/fojubagoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_6037f15aa0bb7.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/gcRMgcJ/xexodudunaxavu.pdfIn PDF document text
    • http://profaudit32.ru/14159830821e28pc.pdfIn PDF document text
    • https://cdn.sqhk.co/tatudawo/eJL9GAK/words_that_start_with_n_for_toddlers.pdfIn PDF document text
    • http://delayikapy.xyz/time_enough_for_love3l4sn.pdfIn PDF document text
    • http://13millions-warzone.store/dsl-2750u_software_updatey7exf.pdfIn PDF document text
    • http://mklhhhh.space/happy_birthday_songs_funny922es.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/igdPhft/bubogaderab.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/KheQeJK/messages_app_download_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412164/normal_6008c12c0bca0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_e803d51234764efebac71a4a93fb1223.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/92442619227.pdfIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_1218a86958a047cbbc9f4fb61cfee838.pdf?index=trueIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_51d57d2443c144a3b190dd03416df289.pdf?index=trueIn PDF document text
    • https://176fe727-baa2-4f6f-8ab0-cddcd97ecb74.filesusr.com/ugd/45df28_7b3f2424dd9b47a38b85408b41c59a99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/chemistry_study_materials.pdfIn PDF document text
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_d52f0dffaebc4e3f8842fc25db29dc59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/firuwoxarukolojulazumipo.pdfIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_0963dad8f21149b0a62a449bc46c6439.pdf?index=trueIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_bd15e8b093d24ab3a2c3e7d19c006c7f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/abcd_2_movie_song_ringtone_free.pdfIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_7b8a010207944c7a981fc401b877401f.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_off0000e18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18F 5088 bytes
SHA-256: f0d90df129a7b34a1a07e8b516f940640db856a4f110f6148822ea9f949efb59
font_01_sfnt_off0000f2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E9 12508 bytes
SHA-256: 5348b85e6c8958f83c9ebecb7900c257d364bb60b2d8748d32189be1c6e8bb86

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