Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77eb8cb67f9be0c…

MALICIOUS

PDF

78.0 KB Created: 2021-03-14 23:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: dc1031ad2bcdef6a7ff7d981f0a57a0e SHA-1: 5934abea2632c13cafb72056fdef14b841b7a018 SHA-256: e77eb8cb67f9be0c52deff67ba844e12b95a3aa02a104044169fd518bacf6989
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and the presence of malicious URLs suggest it's designed to lead the user to a harmful site. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=heating+and+cooling+curve+of+stearic+acid+lab+answers In PDF document text
    • http://gizigevom.mygamesonline.org/29088782349.pdfIn PDF document text
    • http://nakijeku.mygamesonline.org/62273475001.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/iz6hijg/cardi_b_songs_2020_wap_lyrics.pdfIn PDF document text
    • http://fivogudog.iblogger.org/80023280131.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/G4Pgfhi/59944602219.pdfIn PDF document text
    • http://rimiripa.mypressonline.com/arthrite_septique.pdfIn PDF document text
    • https://cdn.sqhk.co/lagusive/Jja6KzK/pinuwimidatopufabozoboso.pdfIn PDF document text
    • http://gakukuketisalum.scienceontheweb.net/allen_carr_in_sfarsit_nefumator.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/5zVhihb/planet_of_the_humans_taken_off_netflix.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/vudivuzakal/43581407484.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/63387044382.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/where_she_went_book_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/77274522056.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/album_barasuara_taifun_rar.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/column_total_in_crystal_report.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/25680555921.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/clinics_in_dermatology_case_report.pdfIn PDF document text
    • http://tawexega.epizy.com/use_avery_template_5160_microsoft_word.pdfIn PDF document text
    • http://rinivuwuvo.epizy.com/31109360233.pdfIn PDF document text
    • http://roxadib.epizy.com/bnz_account_application_form.pdfIn PDF document text
    • http://pixafur.atwebpages.com/difference_between_axe_fx_2_and_3.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/aashiqui_2_movie_video_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/zelienople_police_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/how_to_reset_sony_soundbar_ht-ct790.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_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 5440 bytes
SHA-256: 1731b313270e2cfa13a5cdd1b48c2a1caa7acec219d4cc95a8c88aafd251e834
font_01_sfnt_off000106a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A2 10404 bytes
SHA-256: b8159ca6b4144738434c0092325df2a71589ec02c1359ae3b50581d67e34ead4

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