Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbdedc0bcda92718…

MALICIOUS

PDF

80.5 KB Created: 2021-05-18 04:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 68189b67a856ca2644e6f9a294125245 SHA-1: 907bb87d68380f6d15f7f681b4de9b478dcbc90b SHA-256: dbdedc0bcda927185766dc5cf7f7946b907e7580a7f1d99649074999d0929897
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=escalas+musicales+pdf+guitarra PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457876/normal_5fe8efa36210f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_60178ac448088.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366321/normal_5fc73991bd1c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451210/normal_5fded83825704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483623/normal_5fe20da3e3ce3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417030/normal_604cc4ec97010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491687/normal_605ee74d50a1a.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/safove-zokonaxeze-xewagetetorejos-vujibewofamapub.pdfIn PDF document text
    • https://vowegokemawo.weebly.com/uploads/1/3/4/3/134353822/sowelugumogapovubeba.pdfIn PDF document text
    • https://tedofejufada.weebly.com/uploads/1/3/0/7/130775935/dexofotetogej.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/fajonubinomeder/74548723666.pdfIn PDF document text
    • http://zigubogujivo.epizy.com/speaking_fluent_english_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/aadat_tu_meri_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/fivegudunekagisoduzewar.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/zegamimazegitesaxodidako.pdfIn PDF document text
    • http://riwugiboturom.epizy.com/watermark_maker_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/types_of_oral_poetry.pdfIn PDF document text
    • http://medojowibapij.epizy.com/doubling_and_halving_worksheets.pdfIn PDF document text
    • http://kazupisejurig.rf.gd/icdas_caries_classification.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/how_to_install_canon_printer_without_cd_on_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/combustion_analysis_pogil_ap_chemistry_answers.pdfIn PDF document text
    • http://dotiribene.epizy.com/peronewideranagomaw.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_off0000f752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF752 5432 bytes
SHA-256: 19c8c488a9ae55e9957e2d8bc1da0aa6ece9474ac449243f8385ef44b636e84e
font_01_sfnt_off000109be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BE 12772 bytes
SHA-256: 7892b601d63fa8ef98ca1ebc14456d54d3188409cbb30a55b95e3e445eba0a7d

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