Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df82619cdbc9ed0…

MALICIOUS

PDF

152.3 KB Created: 2021-03-22 11:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c705732f340fed3019a5c984b4727627 SHA-1: ec46438b0554dc94efe6c5b1d260a99318ed1b40 SHA-256: 8df82619cdbc9ed0be6b1185aee50fe31c73aa71aeebe40c5104620034f1d239
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. The document body, though obfuscated, suggests a lure related to a book summary, likely intended to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=resumen+del+libro+lazarillo+de+tormes+tratado+3 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492892/normal_5fc74bc61fd93.pdfIn PDF document text
    • http://strita.space/binomial_theorem_expansion_formulalk7ga.pdfIn PDF document text
    • http://logefekur.22web.org/bomag_bt_65_bedienungsanleitung.pdfIn PDF document text
    • http://daravto18.ru/what_events_occurred_during_the_radical_phase_of_the_french_revolutioniea5z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_602fce3687746.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375700/normal_5ff7f8df228af.pdfIn PDF document text
    • http://br1.red/7593484699698gdp.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/23843052519spke6.pdfIn PDF document text
    • http://gikilebi.iblogger.org/don_juan_demarco_movie_review.pdfIn PDF document text
    • http://smartbright.club/a_midsummer_nights_dream_dreams_vs_realitymc8li.pdfIn PDF document text
    • http://soderenofironev.iblogger.org/gst204_entrepreneurship_and_innovation.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/fusopoxipo/bekizokikefikukepugogoto.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/sepovemulubosegowipixom.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/user_manual_template_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/xubogerokup.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/warolamibenewe.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/87862623340.pdfIn PDF document text
    • http://medesawawolujim.epizy.com/the_story_behind_the_poem_in_flanders_fields.pdfIn PDF document text
    • http://sarupisegov.rf.gd/can_a_wild_dog_kill_a_human.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/todo_sobre_el_capitalismo.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/gunerunuvubonam.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/49969688046.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_off0002162d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2162D 5332 bytes
SHA-256: db8afbd42bf1d6cb8cdf495347e8580d676cf5b6f584423c20db0dba03e13dc5
font_01_sfnt_off0002283b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2283B 12984 bytes
SHA-256: e0c5da50b15cd17a80620b034fb9e4c557749326ab3cc1c815474e945b7b380d

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