Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f8a8665cb264bfb…

MALICIOUS

PDF

69.5 KB Created: 2021-03-06 04:21:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b8460b60d94926ff663960ee7f38ad4 SHA-1: c9e82d60ba9dc8afe62a469d2ea7b2dbcec44786 SHA-256: 7f8a8665cb264bfb26b1e87fb54f01b340c646d6f0d0c2aeb5b39e8308fc99f5
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://dafemum.ru/123?utm_term=the+curated+closet+boutique', which is likely used for phishing or to download a secondary payload. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL and the detection signatures strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/123?utm_term=the+curated+closet+boutique
    • https://cdn.sqhk.co/tobepeliv/fYif2a9/drill_master_heat_gun_price.pdf
    • https://static.s123-cdn-static.com/uploads/4413465/normal_6001fe3b6f87e.pdf
    • https://cdn-cms.f-static.net/uploads/4407070/normal_601851b64933b.pdf
    • http://pozesex.iblogger.org/bumelugiju.pdf
    • https://cdn.sqhk.co/mujowofapubi/heM3gcJ/cnbc_make_it_instagram.pdf
    • https://cdn.sqhk.co/levowexesu/gaje3Xp/nekoxuxevebagaget.pdf
    • http://zekoselu.22web.org/york_diamond_80_furnace_filter_replacement.pdf
    • http://lenulari.mypressonline.com/26430361020.pdf
    • http://tesekal.mygamesonline.org/waduzufudejumebusofizaru.pdf
    • https://cdn.sqhk.co/tetolonul/hHiaq4Z/jirudex.pdf
    • http://fovikoxesaweziz.medianewsonline.com/73353711363.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://guxudapese.epizy.com/tagodetiruvogamag.pdf
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_12dfd8e216144033b3b50505a095713a.pdf?index=true
    • http://bibuxitagarilum.rf.gd/66950326541.pdf
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_c6fb1b7337a64395a9ad6b769638252d.pdf?index=true
    • http://nuluwajewugutik.onlinewebshop.net/how_to_start_word_processing.pdf
    • http://lisuxuzilim.epizy.com/68448694535.pdf
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_e6f1317c8f624646a625e4f491c51bcc.pdf?index=true
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_6ea2ae292c0a4dd78db0e52ac2bdeced.pdf?index=true
    • 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_off0000d24d.bin
ce1cec4c3c91ff2b46c0d24489938755fbdeae0ced6118ed9bffd56619e0369e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD24D 5240 bytes
font_01_sfnt_off0000e40d.bin
df0f35bd032e95288a8e7b839a7f525904d5ea659ee8d4b081b665e54846559d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE40D 11052 bytes