Malicious PDF — malware analysis report

Static analysis result for SHA-256 952ba18017104c23…

MALICIOUS

PDF

79.1 KB Created: 2021-05-13 17:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 01f8caa7c0b12e18c86a7a49faef270c SHA-1: 9418e53539b4c1aad24f25482da7570ce3ceebcf SHA-256: 952ba18017104c23d8013f1790bf53d1f3fd70758be73edabb7764180c656f2f
126 Risk Score

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 0.9997

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://pelibifir.ru/strik?utm_term=which+description+of+salt+is+a+chemical+property PDF link annotation
    • http://manibupefif.mypressonline.com/10_medicinal_plants_and_their_uses.pdfIn PDF document text
    • https://cdn.sqhk.co/tasewapimol/uigYMgj/general_hospital_spoilers.pdfIn PDF document text
    • http://uablog.website/the_chronicles_of_narnia_collection_-_7_bookswtlu4.pdfIn PDF document text
    • http://daliadiago.com/wexozukorenadelilogeifvf0.pdfIn PDF document text
    • http://bifokagomasema.iblogger.org/data_structures_and_algorithms_in_c_2nd_edition_solution_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/supopareso/hauEdOy/just_cause_3_boom_island_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/romumoxoleno/jaiehhA/rojoto.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/hahj5jj/studio_code_level_11.pdfIn PDF document text
    • http://gonaxepafa.iblogger.org/44735813907.pdfIn PDF document text
    • http://twoup-viktoria.online/tevopol5wo0v.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/wisdom_of_solomon_5.pdfIn PDF document text
    • https://cdn.sqhk.co/mivuxakadu/iCK9zfo/digital_marketing_planner_job_description.pdfIn PDF document text
    • http://zilofunawoson.iblogger.org/kanuzefidubep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/how_to_reset_xerox_drum_cartridge.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/pezotevod.pdfIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_3ecb2a16afd7410595869dee82994b3f.pdf?index=trueIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_236b3faed9014388be0eb3487cba052c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/masevewi/biwaxurojonululesuxo.pdfIn PDF document text
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_af2d8d5c2e8e46f5b1ab23e1cdfcdce0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/carroll_isd_alternative_transportation_form.pdfIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/bakavelotukimezilasigi.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_off0000f6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BD 5508 bytes
SHA-256: c4f010340c903e075aa5eea177b409b1011640850b2520b2111ee3df11f93197
font_01_sfnt_off00010964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10964 11056 bytes
SHA-256: 03ed5a9eb6c908423b629a56b272cca233b8ea11632e047f9a2b8d006ff99925

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