Malicious PDF — malware analysis report

Static analysis result for SHA-256 947df1f679ab69e7…

MALICIOUS

PDF

76.6 KB Created: 2021-04-21 03:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 73d999b8d4477c1158eacdf3c64911ff SHA-1: 00207a4ba3094467947a780d29dbc454cb5c56c3 SHA-256: 947df1f679ab69e793d4af6e83a1afdf9aedf7bc17dbe63f0dfd616a9d16d942
162 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a link farm designed to obscure malicious destinations. The ClamAV detection and ML classifier further support the malicious nature of this PDF, likely used as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=the+hunger+games+2012+movie+download+in+hindi+300mb PDF link annotation
    • http://kolomata.ru/python_basics_for_data_science_ibm_githubiljpz.pdfIn PDF document text
    • http://lbaranaydin.com/how_to_reset_03_honda_accord_maintenance_lightkyt1g.pdfIn PDF document text
    • http://znakomstva18x.site/how_to_install_rear_facing_safety_1st_car_seattys2m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_606e9dd7650e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5fedbc03a2e37.pdfIn PDF document text
    • http://sputnews.com/sowewelozazositojekikevei0bga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461229/normal_6015903868d88.pdfIn PDF document text
    • http://wejnpowk.space/sivaji_the_boss_telugu_audio_songs1hpn3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_6044d8fb6feac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459029/normal_600e65e229b1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a097acee-f288-4f3c-925e-d849a3b069ed/90543574338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c108e2e7-894a-4860-82b8-7e891793937a/winuxarisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5da68fa-5cba-4b0d-9472-914b381ec721/bavex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5572de67-68f6-493f-977e-a8f23ceea430/how_to_use_directv_genie_remote_control.pdfIn PDF document text
    • http://momomalolo.epizy.com/nosql_database_design_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b03c481-42c5-4b72-83e0-1e0ac6e36914/calories_and_carbs_in_green_leaf_lettuce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3fb9ed5-1816-415f-8b79-f64617bd35ba/hbs_910_digikala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/013954eb-6684-41c4-93d2-29e52835aee9/70029185129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f59df2c-8a1a-4b38-9f3f-134bf07138e0/68996520401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7360f97e-04b8-4212-9df9-c6b6ab176dd4/skyworth_65_inch_tv_price.pdfIn PDF document text
    • http://nufewaruxemo.epizy.com/xogivorinefavusodabemot.pdfIn PDF document text
    • http://kefabebabefi.rf.gd/xurife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a2fdfd-8c71-4a47-a6cd-fd3bb4f09272/samsung_tv_remote_control_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd731574-dc5e-410c-b25f-f73bffc6e8e6/lazireboluk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE970 5968 bytes
SHA-256: 51035e08d37cc90ff17806fc15ae6fcd2f0f608a6bb8f92133b554f81536c739
font_01_sfnt_off0000fdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAE 11360 bytes
SHA-256: 16a49c681501ad181ddf505056013723979c811e8da5cdec1c6a11350b85f5cc