Malicious PDF — malware analysis report

Static analysis result for SHA-256 2adf1fb70e60155a…

MALICIOUS

PDF

72.3 KB Created: 2021-01-25 17:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 41f33e60eefc69edf39db504b4267df9 SHA-1: cbfc38c71f6263cd7152b54892b3d29fea557834 SHA-256: 2adf1fb70e60155ae99bf100800ec3262b3ba67e0e0ec65e63da4a09608b7c1b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'channel guide smart tv', likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://baarspo.ru/wb?keyword=channel%20guide%20smart%20tv PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4503033/normal_5fc97e54f2c77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425484/normal_5ff96d2b9a88a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366661/normal_5fe174223b0f4.pdfIn PDF document text
    • http://eslivdrug.space/one_time_top_up_virgin_mobilersx4p.pdfIn PDF document text
    • http://tur8osale.site/chatous_3._9._85_mod_apk0x9tk.pdfIn PDF document text
    • http://haustova.com/photo_editor_effects_free_download_for_pcirkjl.pdfIn PDF document text
    • http://bubble1.space/how_to_cook_potstickers_on_stovewx6bg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366406/normal_5fcdb8d3b80a0.pdfIn PDF document text
    • http://reduslim-italia.website/usanetwork_activate_nbc_fire_tvd5sdk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415754/normal_5febdb7754243.pdfIn PDF document text
    • http://fumigatoff.online/54486264876s7zrn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wovitiku/88821634008.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/15258616771.pdfIn PDF document text
    • http://kezepinaxozegom.epizy.com/45338029388.pdfIn PDF document text
    • http://bowukedogatowo.epizy.com/aguner_poroshmoni_full_song.pdfIn PDF document text
    • http://nekaxikafixof.epizy.com/cara_membobol_wifi_tanpa_aplikasi_dari_android.pdfIn PDF document text
    • http://momugegunimex.rf.gd/vatag.pdfIn PDF document text
    • http://ritanuwo.epizy.com/43482493598.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_off0000ddd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD0 5204 bytes
SHA-256: 6b3dfb41d93f376fe79e67961f4ae183350be74c12cb78718942e635eff6ca5d
font_01_sfnt_off0000ef54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 10816 bytes
SHA-256: e8fa875ff88647c1fc65a46dd4efbe7144a857f4d9685588b5163b27a1919285

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