Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d35dab9e166ab23…

MALICIOUS

PDF

80.8 KB Created: 2021-04-21 23:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b28256f07cacebe84352ec8c2807dc72 SHA-1: c88ce1c68a274b4a5e10275adc9887c6b13f79ec SHA-256: 2d35dab9e166ab23028207707a366a2870f97064df5aad3a634a36d6ca1afd91
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document that uses a cloud document lure to impersonate a legitimate file-sharing service. It contains an embedded URI pointing to a suspicious domain, likely intended to lead the user to a phishing page or download a secondary payload. ClamAV and ML classifiers also flagged this file as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://zajinet.ru/strik?utm_term=project+management+software+definition+simple PDF link annotation
    • https://cdn.sqhk.co/duvetezoje/hchfDed/28220345461.pdfIn PDF document text
    • http://espacecmb.xyz/jelipexivunuzudi4j5v8.pdfIn PDF document text
    • http://polypak.site/pegatron_motherboard_m2n78-la_manualyuv9f.pdfIn PDF document text
    • http://tipografiyav.moscow/gezogizovewebuxinudax89nqv.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/VgcdYLF/ultrasport_racer_1000a_bedienungsanleitung.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/11539156170.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478670/normal_5fe04f957d59b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413122/normal_604387675081a.pdfIn PDF document text
    • http://toppiksnack.xyz/danosojijdhe6x.pdfIn PDF document text
    • http://navaram.online/black_and_decker_hedge_trimmer_20v8d4xd.pdfIn PDF document text
    • https://cdn.sqhk.co/gimatuvuwiw/Vjgf2vo/supreme_stickman_shadow_fight_battle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_602158e7df710.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/what_is_the_average_amount_of_words_to_type_per_minute.pdfIn PDF document text
    • http://negedibomul.sportsontheweb.net/boliwodakojewobekuvum.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/wgfShbv/dessert_ideas_with_chocolate_cake_mix.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/jonora/menujivugaxexirosimetoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/story_of_your_life_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/69871433112.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/baluzozot.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/identity_v_perfumer_guide.pdfIn PDF document text
    • http://ferodibev.onlinewebshop.net/63053449177.pdfIn PDF document text
    • http://tobidogajetu.onlinewebshop.net/pie_jesu_andrew_lloyd_webber_free.pdfIn PDF document text
    • http://tobidogajetu.onlinewebshop.net/industrial_accident_investigation_report.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_off0000fec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC6 5644 bytes
SHA-256: 788d75aeb985000c158304781b16feec2055b4d9bcf5810837b119ad01730317
font_01_sfnt_off000111f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F7 10432 bytes
SHA-256: f94fcc34866a7480de756c96a7e8a7d669deff254989380f816826f5f701c667

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