Malicious PDF — malware analysis report

Static analysis result for SHA-256 32aabd52c2a74dc5…

MALICIOUS

PDF

78.3 KB Created: 2021-03-04 07:32:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f5cd9513d358de54d430e1e1ea6c6825 SHA-1: 1c3a91886fd146ec421632d05524d44436dbe0ce SHA-256: 32aabd52c2a74dc518a98fea6c0f4c18076c190bcf3803f8bf64eab4af510c35
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://nipisod.ru/strik?utm_term=jump+rope+workouts+pdf', suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, appears to be related to workout PDFs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=jump+rope+workouts+pdf PDF link annotation
    • https://cdn.sqhk.co/vakenuda/jghMhbH/4_pics_1_word_level_2275_answer.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/VijGjcn/descargar_swamp_attack_hack_apk_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/Vohecgd/ladukakedevozopibodir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_603ccb891e418.pdfIn PDF document text
    • https://cdn.sqhk.co/bavisimupux/6E0gicm/50_dollars_in_1947_worth_today.pdfIn PDF document text
    • https://cdn.sqhk.co/sobekalob/agdgcEG/vuwumopakemesigolugeri.pdfIn PDF document text
    • https://cdn.sqhk.co/rigidaluta/jaDjbji/facebook_logo_white_png_transparent.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/g5jifeu/chocolate_covered_strawberries_bouquet_ideas.pdfIn PDF document text
    • http://gumazesetijub.iblogger.org/can_am_spyder_rs_owners_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/KhifCbl/52708048680.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/jiaidgg/md_acne_face_mask_review.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/hahhXGo/paxedeb.pdfIn PDF document text
    • http://wuxevonatot.iblogger.org/why_is_the_water_not_working_on_my_fridge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pigepitusedotet.rf.gd/the_chocolate_touch_questions.pdfIn PDF document text
    • http://jagesaba.epizy.com/kokigagosotufesige.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_off0000f75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 5092 bytes
SHA-256: e5d0f6fb5282625db0b102db2c39fc1a44a87dfeebc8eea417db58140a789964
font_01_sfnt_off000108b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B1 10432 bytes
SHA-256: 8ef6d255d688be1fb79fb1e9301e93f4a15755f7d6ea5e7468ed024b3ed926b1

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