Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b49f263a0eef3b2…

MALICIOUS

PDF

97.0 KB Created: 2021-03-15 21:22:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 18e3f30126aa842c5323c34a153a8adf SHA-1: 8d940c6d0f039326b2fc80312376de605b1faa5d SHA-256: 8b49f263a0eef3b22ea4f2461fbbcf30cb291f966f7523aee4e85196b89b53ea
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://soxebez.ru/wix?keyword=vex+edr+tower+takeover+game+manual PDF link annotation
    • https://fevepoxopimumu.weebly.com/uploads/1/3/2/3/132302951/juxukidug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fff6121ca16e.pdfIn PDF document text
    • https://ripodomix.weebly.com/uploads/1/3/0/7/130775876/pubozidawujeriguled.pdfIn PDF document text
    • https://verijijul.weebly.com/uploads/1/3/4/8/134861220/98251.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/T1scghm/elon_musk_rocket_launch_2020_time.pdfIn PDF document text
    • https://cdn.sqhk.co/patizuruf/d0ifFBN/zegopubet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486356/normal_5ff2a93b1c71f.pdfIn PDF document text
    • https://dawozonejuveru.weebly.com/uploads/1/3/4/4/134489779/6062423.pdfIn PDF document text
    • https://nemaxololele.weebly.com/uploads/1/3/5/3/135304154/rejonek-kizazune.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408720/normal_5fc61e013b826.pdfIn PDF document text
    • https://zanixikowupu.weebly.com/uploads/1/3/1/4/131437740/d84b501dd94a3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471230/normal_600ae031a814c.pdfIn PDF document text
    • https://cdn.sqhk.co/zosurinipin/yNDEieS/demon_emulator_apk_download.pdfIn PDF document text
    • https://fogufapepupol.weebly.com/uploads/1/3/1/8/131871477/wuwavezelud-riwiwiraloriv-kexulaw-gamozedaku.pdfIn PDF document text
    • https://cdn.sqhk.co/risejesob/jcI5hhC/break_bricks_balls_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/hhRjhgi/weed_leaf_cartoon_png.pdfIn PDF document text
    • https://kuxalureb.weebly.com/uploads/1/3/1/3/131383592/dapukokupisimixumuva.pdfIn PDF document text
    • https://tifogufa.weebly.com/uploads/1/3/1/6/131637606/famojiwela.pdfIn PDF document text
    • https://vejevidumuruje.weebly.com/uploads/1/3/5/3/135302175/468942.pdfIn PDF document text
    • https://cdn.sqhk.co/legezuseg/yRgc8Ze/dipavuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/ha6xWjc/mjs_defence_academy_lucknow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mudurixo/road_rash_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/firadatetujirilavis.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/dsssb_jail_warder_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/xawawa.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/d_h_r_m_full_form.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_off00013133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13133 5052 bytes
SHA-256: 5c2cfb212f0c1c7391cc630f186358864a6ef881eca61577d58fe124d0914922
font_01_sfnt_off0001426b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1426B 11004 bytes
SHA-256: f524b6e0ad65f68f9f42681e8a69336c34728cb036b345980b006e3a908cd20a
font_02_sfnt_off0001680a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1680A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2