Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c36c04327b0c7b…

MALICIOUS

PDF

1.03 MB Created: 2021-06-09 12:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 46c2756eee70be45d0f09f59603d9852 SHA-1: 1d899b0648303713a385e82a5eeda4e72931646e SHA-256: 70c36c04327b0c7bdd12206bbd473c3e814a1336b34496403834615eaf7d0df8
86 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The sample is a PDF document that contains an external URI pointing to 'https://infrive.ru/pbw?utm_term=vasudevan+latest+edition+pdf+download'. Heuristics indicate a lure to enable macros or editing, a common technique for malware droppers. ClamAV also detected this file as a phishing trojan. The PDF structure and embedded URI suggest an attempt to trick the user into downloading and executing a secondary payload.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3457

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://infrive.ru/pbw?utm_term=vasudevan+latest+edition+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408709/normal_600e44798fdd5.pdfIn PDF document text
    • https://xojowikenokux.weebly.com/uploads/1/3/4/7/134706662/f68e84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_604afefa3eff7.pdfIn PDF document text
    • https://pijaremurepapo.weebly.com/uploads/1/3/1/4/131406688/92c0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452392/normal_5ff9c94515815.pdfIn PDF document text
    • https://diwekivoveludu.weebly.com/uploads/1/3/5/3/135313391/xikupuzixod.pdfIn PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/69894756fb9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450151/normal_5fe6f908e0512.pdfIn PDF document text
    • https://wemupubipu.weebly.com/uploads/1/3/5/3/135331653/pozev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_605d681f587a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476577/normal_5ffc6ab1dd1c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370268/normal_5fef86748f238.pdfIn PDF document text
    • https://zesalefol.weebly.com/uploads/1/3/5/9/135994098/riroxegurig_nedowadamuj_gibuz_kabimuvobiz.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xawaren.pbworks.com/f/vizio_5.1_sb3651-e6_review.pdfIn PDF document text
    • http://palixazoke.pbworks.com/w/file/fetch/144427548/52573897352.pdfIn PDF document text
    • http://bukafag.pbworks.com/w/file/fetch/144564174/nioh_2_official_strategy_guide.pdfIn PDF document text
    • http://nolumemonip.pbworks.com/f/hack_pirate_kings_for_iphone.pdfIn PDF document text
    • http://vedufid.pbworks.com/f/how_to_be_a_copy_and_paste_girl_on_roblox_without_robux.pdfIn PDF document text
    • http://vogituvu.pbworks.com/w/file/fetch/144603135/best_normal_orange_hero_last_shelter.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/w/file/fetch/144467526/how_to_restore_mxq_box_to_factory_settings.pdfIn PDF document text
    • http://dusozivelas.pbworks.com/w/file/fetch/144877410/sadlier_vocabulary_workshop_level_c_unit_9_choosing_the_right_word.pdfIn PDF document text
    • http://xosezoranad.pbworks.com/f/75462119594.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_off00102058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102058 2284 bytes
SHA-256: c4b66168230e00874d2c0f9f928e7eaa2996cd8aefc723785ce90e5c76e85394
font_01_sfnt_off00102ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AC2 5056 bytes
SHA-256: 91495ee59e3e05627d17add2adf933c412ba51127ec5a348f2c4df55b9f04849
font_02_sfnt_off00103c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C31 15412 bytes
SHA-256: abe3ba6bc720886dfcd18b394fad6acc3632d017da5ab395a1fc42f32c36f76a