Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b62d6daa6eade0…

MALICIOUS

PDF

76.3 KB Created: 2021-03-25 06:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a81ae6ade07acb7338885a03f9960f1 SHA-1: eeeedbd333c44c637a9090442d4c304df8ef3670 SHA-256: 61b62d6daa6eade08d5a939e482e965b58b5c15e65eb94e94f5a3a81f075b245
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that leads to a phishing site, as indicated by the ML classifier and ClamAV detection. The document body, though heavily obfuscated, appears to be a lure related to a book release, aiming to trick users into clicking the malicious link. The presence of external URIs and the overall detection by multiple engines strongly suggest a phishing attack.

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://resalured.ru/strik?utm_term=danielle+steel+royal+release+date
    • https://cdn.sqhk.co/bitaxukezor/AjchgVa/zelidodebi.pdf
    • http://naturwow.space/piano_key_labelsogsr7.pdf
    • http://stopro.store/komelifuxugutujuw5fdj.pdf
    • http://tofotibuwul.sportsontheweb.net/asahi_pentax_spotmatic_manual.pdf
    • https://cdn.sqhk.co/rozopebak/aiegehd/walking_dead_movie_date.pdf
    • https://cdn-cms.f-static.net/uploads/4415326/normal_60382fc87bdfe.pdf
    • http://rozujed.sportsontheweb.net/bosch_glm_15.pdf
    • https://cdn-cms.f-static.net/uploads/4422134/normal_60362d13a0bc9.pdf
    • http://websporizle4.com/alimentos_prohibidos_para_diabeticos_e_hipertensossy5yt.pdf
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5fe890f75dfdc.pdf
    • https://cdn.sqhk.co/tubawonidas/h3H8jjo/66545030065.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dakovemusurevo.epizy.com/93298915195.pdf
    • http://xelemebimatof.epizy.com/sujurox.pdf
    • http://vumamuv.myartsonline.com/lava_uke_chords.pdf
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_c587a095aceb4bfa9875729a71eed121.pdf?index=true
    • http://ribaxekag.epizy.com/37156200403.pdf
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_83f5abc4a1b9427583b899ecc4da1f16.pdf?index=true
    • http://bujekotu.atwebpages.com/best_english_literature_courses_in_uk.pdf
    • http://fazaburifug.myartsonline.com/95783429424.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef26.bin
8c51bd35504558a2c56d8642e5eb969df0ac0606ba37983c86a28758038fc647
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF26 4920 bytes
font_01_sfnt_off0000fffc.bin
48578e3ed2a5e4a0a1f5fd7a7ada0274b2e3a7fa716b8443a44c250d09c2f442
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFC 10556 bytes