Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94b07bd2f0cadfc…

MALICIOUS

PDF

75.0 KB Created: 2021-04-01 20:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d1eee592e238125a3ae35ceab1b4680b SHA-1: 403138385988cb8e359b026e4b582a49968905fc SHA-256: e94b07bd2f0cadfc7f9cdc06a3c651c673b7b518b09cb603498e87bf6c8c4adb
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 0.9996

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://resalured.ru/award?keyword=decrease+pdf+file+size+in+kb+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450355/normal_6029a6c8ea081.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/handmaids_tale_watch_online_free_season_1_episode_1.pdfIn PDF document text
    • https://simebofes.weebly.com/uploads/1/3/1/4/131438459/daluxuwepetuk_bagiwazomavi.pdfIn PDF document text
    • https://kenufipafalenar.weebly.com/uploads/1/3/4/6/134616414/7906119.pdfIn PDF document text
    • http://gufutaca3.xyz/five_love_languages_test_quizc38fl.pdfIn PDF document text
    • http://lnstagramcentre.net/game_car_racing_gamephi1h.pdfIn PDF document text
    • https://jabipiduluw.weebly.com/uploads/1/3/4/6/134662585/3106855.pdfIn PDF document text
    • http://mapumuvovabukux.22web.org/docusate_sodium_colace_davis.pdfIn PDF document text
    • http://online-bestshop.xyz/rovilamofowuzedijulizuf81hua.pdfIn PDF document text
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/2676924.pdfIn PDF document text
    • http://nefutekugurenap.mygamesonline.org/amplifier_project_class_12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492918/normal_60302812559fa.pdfIn PDF document text
    • http://legegapepapo.medianewsonline.com/1568696581.pdfIn PDF document text
    • http://bonifacy.site/deserts_of_kharak_mission_guidetrxim.pdfIn PDF document text
    • https://pupewofitesog.weebly.com/uploads/1/3/4/7/134771191/2172837.pdfIn PDF document text
    • http://vatirigidofaxu.iblogger.org/25654792150.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mulukamuzadesew.epizy.com/apache_tomcat_8_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/sand_balls_game_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/haryana_judiciary_exam_2018_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/jaybird_x5_release.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/kizefenid.pdfIn PDF document text
    • http://rowomasogig.epizy.com/final_cut_pro_7_tutorial.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_off0000e958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE958 5400 bytes
SHA-256: 61a5fa17c811474369d4d1185d230948df6e7dc755c8646ab5880cbcf98ef5a6
font_01_sfnt_off0000fbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCE 10156 bytes
SHA-256: 7fd89d04041341debf2100133dafd97a599c78c9913193be9fa64d041a950836

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