Malicious PDF — malware analysis report

Static analysis result for SHA-256 439de16b136acdbd…

MALICIOUS

PDF

82.9 KB Created: 2021-01-03 16:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9f6e34eb488de322bb2b130eab1bb0a9 SHA-1: 9a85b6aac0e8c6f7f28fd4f46e2c40a524bf2bea SHA-256: 439de16b136acdbdfec32ac98b09a273028b0f7f25743c4a068bfbe39bdc5d19
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffking.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to plant reproduction, designed to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/123?utm_term=what+do+ferns+use+to+reproduce PDF link annotation
    • https://cdn.sqhk.co/jawutuwek/PhhcOuR/prison_break_season_6_episode_1_full.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/Usw6cLs/fedizuni.pdfIn PDF document text
    • https://cdn.sqhk.co/velizovatim/6haTWgg/53039518835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5f9a0b39b088b.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwagezo/EiaPMOk/joxutederirog.pdfIn PDF document text
    • https://cdn.sqhk.co/keliziniw/5kjggjP/tanolumufej.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/JJigjSl/44169371152.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/ajbibhf/learn_spanish_offline_speak_spanish_alphabet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372960/normal_5fcf98ac3148d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5f9e83d8a59d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/remeranexe/logo_quiz_answers_level_16_samsung.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/vonesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90bd1145-5f2d-4a30-883d-6735526fb5b9/baldurs_gate_dark_alliance_gba_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/tensile_strength_of_304_stainless_steel_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC5 5060 bytes
SHA-256: 0e952a93b600835e0510aa3d25ce4c0288480dbfb6db47026c3f1c7f684bdac0
font_01_sfnt_off00010bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFA 10836 bytes
SHA-256: 7578f794ade11ea89e7c4ddc385a93f75bb5f96c60efe28f15ab94ed0d45a806
font_02_sfnt_off000130cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130CF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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