Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb992bdf707d6028…

MALICIOUS

PDF

80.8 KB Created: 2021-02-11 10:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: dc1c4297a16ec9fb7a898a2126aeb518 SHA-1: 4ec3e762778f77cccd9feb75f8b7a9716f7a9c4c SHA-256: eb992bdf707d6028023934364d4e0801c2a3cf6456d59ad7e3b7d70e3dc3f9aa
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to reference a product datasheet, likely a lure to encourage users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://seumenha.ru/wb?keyword=apc%20smart-%20ups%20srt%202200va%20230v%20datasheet PDF link annotation
    • http://votilabelomebom.iblogger.org/cyanogenmod_installer_dla_android.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/sk4Nhjb/best_tactical_knife_with_glass_breaker.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/icPgfia/whatsapp_love_status_video_tamil.pdfIn PDF document text
    • https://zixozuji.weebly.com/uploads/1/3/1/4/131454221/kametibur.pdfIn PDF document text
    • https://bumovewadenol.weebly.com/uploads/1/3/5/3/135318567/8d653a649.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383802/normal_600640753fb29.pdfIn PDF document text
    • https://cdn.sqhk.co/wexifidobafo/Uihhfie/41023022739.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/c4MNchb/scrapyard_tycoon_idle_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/ihhbic0/fudakegowejuwugu.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/6101025.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/f39icic/first_aid_beauty_ultra_repair_cream_review_acne.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_5fe77838e9232.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/zefowos.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/guided_math_vs_math_workshop.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/tewubozi.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/dance_battle_songs_free.pdfIn PDF document text
    • http://mezezix.rf.gd/burning_series_app_serien_en.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/spartan_and_athenian_education.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_off0000da51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA51 5800 bytes
SHA-256: d522b79c81b88dfcb20f1a6b62d5f7505155b8181626f7f06931fb4309702d5b
font_01_sfnt_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 14244 bytes
SHA-256: 6d5c0db3d83419f039a89d1ea8fe86d6177a7e3d108a8327fc476046fdafc700
font_02_sfnt_off0001178a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178A 9592 bytes
SHA-256: 6b8e5d8bf6d9c3e3a286c81019b7c826d745945ea8bff7d866570211b5284b49

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