Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5aec8359398e75…

MALICIOUS

PDF

83.0 KB Created: 2021-04-13 22:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bb5228d3fffdbd9751741b74477c7f9 SHA-1: 5ed26d9a25f6aa5880bb7dd95f39c6865aedfce1 SHA-256: 2b5aec8359398e75a1a318eecbbac27598501bdf2effdd8422feef516c789234
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL leading to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'time management tips videos'. No scripts were extracted, but the PDF structure and embedded URI heuristic point to a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=time+management+tips+videos
    • https://cdn-cms.f-static.net/uploads/4376105/normal_605d81d10fa2c.pdf
    • https://cdn-cms.f-static.net/uploads/4460963/normal_60100e27bf285.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/cb49189e-ef04-446c-b311-a8969df6a0d6/pujokufenafobu.pdf
    • http://nilijevenenox.epizy.com/zogimiwoxod.pdf
    • https://uploads.strikinglycdn.com/files/f3603d81-865d-4f76-a1c7-2bb208c37bbf/tizutuxajesabixobafabijam.pdf
    • https://s3.amazonaws.com/sirilagewuga/kovepoxodulesirunupegedot.pdf
    • https://uploads.strikinglycdn.com/files/aeec5a49-936c-41c0-adec-ead02b16a1c9/62996519728.pdf
    • https://uploads.strikinglycdn.com/files/9400bcb7-17d8-4b1b-bf82-dfe3fb07d363/concepto_de_investigacin_educativa.pdf
    • https://uploads.strikinglycdn.com/files/a2695462-4c20-48e4-b926-cdae36a63371/project_management_software_define.pdf
    • https://uploads.strikinglycdn.com/files/b77d9ea2-691d-4170-a9d8-9813cd6fa4b5/wutomewoji.pdf
    • https://uploads.strikinglycdn.com/files/b2acd1f5-8224-465c-a70e-b597a17c06cd/fitbit_charge_hr_bands_jb_hi_fi.pdf
    • https://uploads.strikinglycdn.com/files/94961daa-a377-45e4-8be2-01556c1bae7d/20134823189.pdf
    • https://s3.amazonaws.com/gazijewevan/pound_to_kg_calculator.pdf
    • https://uploads.strikinglycdn.com/files/374acad6-7867-40ab-80f4-e8ef60ff567a/canon_powershot_elph_115_is_battery_charger.pdf
    • https://s3.amazonaws.com/nafibanefexex/are_whole_house_humidifiers_safe.pdf
    • https://uploads.strikinglycdn.com/files/6bdde441-b6fe-46e7-b33b-7f65e3782e24/canon_powershot_d20_battery.pdf
    • https://uploads.strikinglycdn.com/files/5c1c0bf1-da62-4ecf-9ab1-f9b964e56200/what_to_bring_to_get_real_id_mn.pdf
    • http://nilakumofuxej.rf.gd/effects_of_international_migration.pdf
    • https://uploads.strikinglycdn.com/files/a62f06a5-4b40-4830-aae9-dc711369422a/libro_el_arte_de_la_seduccin_descargar_gratis.pdf
    • https://s3.amazonaws.com/jadudusujuje/free_template_slide.pdf
    • https://s3.amazonaws.com/fekife/rufos.pdf
    • https://uploads.strikinglycdn.com/files/9243b62b-399a-448d-b007-bc1b03017805/macbeth_act_2_scene_4_meaning.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb5f.bin
69ae8468bdca2349ba0f6a4f302e959475559e500b0d26ea9841cd4eeddf0cc6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5F 4948 bytes
font_01_sfnt_off00010c1d.bin
00297c7cdbfe262cb0c198ac72fcd3942ad9a6cd74e034e974b32a748e671864
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1D 10688 bytes
font_02_sfnt_off0001307d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1307D 4324 bytes