Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddff6634b59c6452…

MALICIOUS

PDF

76.8 KB Created: 2021-03-16 00:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 41cda385822b77a7b553eed120081ef5 SHA-1: 05bb7b39ac6b5650adb8a98aff94054c5158a3eb SHA-256: ddff6634b59c6452df4889d1f7fb5c53734624fcaef80b89b2a515776acb5d66
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 0.9998

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://nipisod.ru/123?utm_term=cash+flow+template+free PDF link annotation
    • https://cdn.sqhk.co/xaveredero/jjigQoj/akcent_all_songs_zip.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/20522643725.pdfIn PDF document text
    • http://pifowovumuwe.medianewsonline.com/49724903600.pdfIn PDF document text
    • http://zipolilur.iblogger.org/statistical_analysis_in_psychology_and_education_6th_edition.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/robotica_definicion.pdfIn PDF document text
    • http://buytoday.cc/vocabulary_builder_activity_ancient_india_answer_keyojxaf.pdfIn PDF document text
    • http://trysoda.pro/video_games_etc_ps4_controllertvn4u.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwosexed/Wc4Qjhe/heroism_definition_and_examples_of_noun.pdfIn PDF document text
    • http://oneitstore.pro/nufafalolosivezindq6ix.pdfIn PDF document text
    • http://aazzzry.space/fusiform_skeletal_muscle_structure8e48y.pdfIn PDF document text
    • http://wutopezogegusi.getenjoyment.net/neporawixo.pdfIn PDF document text
    • https://cdn.sqhk.co/forokuxodel/RVhX5GM/mahjong_solitaire_classic_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/hhsXheL/varirizajisepowu.pdfIn PDF document text
    • http://nazhivy.net/765481136846v5by.pdfIn PDF document text
    • http://xomunuxeju.sportsontheweb.net/jilivetagokusafupenez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_c3a50282a16a47bfb94f2fa0353a8170.pdf?index=trueIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_aeabe0713852444c97a4e8e066b570ef.pdf?index=trueIn PDF document text
    • http://larisakexifa.epizy.com/chillerama_full_movie_in_english.pdfIn PDF document text
    • http://zekarevuwo.epizy.com/cuddledown_german_flannel_sheets.pdfIn PDF document text
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_217ded872e0744b2ba908e5c89080572.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA9 5140 bytes
SHA-256: 3995753d7d00f91667ccc42c153bc7c267cf80442e240fc895a740827ccb5ac6
font_01_sfnt_off00010109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10109 10744 bytes
SHA-256: 120a7b170355e64767ee4ff15f308e54a5dc0e9576109261170daeb47e50442f

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