Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4d3713297b221b…

MALICIOUS

PDF

67.7 KB Created: 2021-02-16 05:24:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c4702746e10cbf7a7f5eb722c4f0b241 SHA-1: de8238684ae2d8a6dc9df315be00df17ccd5a582 SHA-256: ee4d3713297b221bbc2652cad8ab1ced06c709a04d278f90083caba8fb0fe131
134 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wb?keyword=70-411%20questions%20dumps PDF link annotation
    • https://cdn.sqhk.co/muligumixe/Thhx4YZ/kleptocats_2_codes_space_station.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496577/normal_5feb2729aa6bc.pdfIn PDF document text
    • http://ramosek.iblogger.org/fapinu.pdfIn PDF document text
    • http://peludofnor.fun/instructional_technology_and_media_for_learning_bookm22hv.pdfIn PDF document text
    • https://cdn.sqhk.co/pukikojat/gegjAji/itopya_monitor_iade.pdfIn PDF document text
    • http://reduslimitaly-official.site/329261662893e980.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369308/normal_5ffca0b7ba139.pdfIn PDF document text
    • http://raboleziwuga.iblogger.org/cheat_sheet_tft_9._18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465387/normal_5ff0a00b75f9b.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/15725215849xzxsk.pdfIn PDF document text
    • http://shop-profildoors.ru/surat_an_naba_ayat_1-_10gtnqg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414689/normal_601dfe7ca29cc.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/SUiikhh/lagu_slow_rock_hits_offline_download.pdfIn PDF document text
    • http://bachanalytics.com/60350970709jfulm.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/jLidgiD/boo_2019_movie_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/gfhcUgg/kawevumivar.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/lemerisinivum/70777794716.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/adt_pulse_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/bedingte_wahrscheinlichkeit_formel_von_bayes.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/backup_photos_from_android_phone_to_pc.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_off0000cc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC43 5192 bytes
SHA-256: 62c92582ab2eca9f02ed81d396c5f457da88a1e52c45bc7122a0d54ae9dab44c
font_01_sfnt_off0000ddf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF2 10648 bytes
SHA-256: d91a4a22eabb3ce510d5e58876af546a85b3b86e176723ba5df723b6139dec08

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