Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3b967644fc0f00…

MALICIOUS

PDF

85.8 KB Created: 2021-04-18 22:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d2c3a7a0c6744340bc3ee696c194829d SHA-1: 22365610d4e20974c7f85d12e684d668bc170855 SHA-256: 8e3b967644fc0f002695ac184c65498ba63284033dbf0ee3e57559392cc0629d
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating the presence of external URIs and embedded URLs, with a high ML confidence score and ClamAV detection confirming its malicious nature. The document body, though heavily obfuscated, suggests a lure related to 'The boy in the striped pajamas' summary, likely intended to trick users into clicking the malicious URL. No scripts were extracted, but the presence of multiple suspicious URLs points to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/strik?utm_term=the+boy+in+the+striped+pajamas+chapter+4-6+summary PDF link annotation
    • http://wipebodu.mypressonline.com/73988479328.pdfIn PDF document text
    • http://totaxusozavu.sportsontheweb.net/37132940572.pdfIn PDF document text
    • http://epipog.com/9092884890141eei.pdfIn PDF document text
    • http://leree6.club/zorivurifuredajo1lgz.pdfIn PDF document text
    • http://negifowutagur.mygamesonline.org/34807387576.pdfIn PDF document text
    • http://thrivewebs.com/bulozeporaluse3qyun.pdfIn PDF document text
    • http://getchambre.xyz/derek_fisher_matt_barnes_bleacher_reportmnteu.pdfIn PDF document text
    • http://boost-store.net/modernist_bread_bookfw94e.pdfIn PDF document text
    • http://unlockdeals.shop/fuwufelexojerotalizuforajwa2j.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/adolescent_health_care_a_practical_guide.pdfIn PDF document text
    • http://radanews.site/dapetepiperawogx3j71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/the_road_less_traveled_ebook.pdfIn PDF document text
    • http://nokudumufax.rf.gd/present_perfect_just_already_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/cigarette_daydreams_sheet_music_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/logical_reasoning_test_with_answer.pdfIn PDF document text
    • http://mumuvovowoxoje.epizy.com/caia_level_1_practice_exam.pdfIn PDF document text
    • http://riwofepijisanet.epizy.com/sbi_internet_banking_profile_password_reset_form.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/4._estimate_the_osmolarity_of_the_potato_tuber_tissue.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/desup.pdfIn PDF document text
    • http://zopofomolukomek.rf.gd/jodi_picoult_perfect_match.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/tezuxukoxarezumozodariwum.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/acidimtrie_et_alcalimtrie.pdfIn PDF document text
    • http://xamukuxoze.epizy.com/barron_s_regents_chemistry_answers.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_off00010c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7C 5824 bytes
SHA-256: 20615bfee4e9ccf03b95d805581d55c00f6892485843a1f81ba9e4fa58f024ce
font_01_sfnt_off00012031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12031 11984 bytes
SHA-256: d805dfbcef4ef6bb249fc109eed6df104f1907a66afed9de2cb28f4858421c8d

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