Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c22ba1b2a42725f…

MALICIOUS

PDF

78.0 KB Created: 2021-03-11 09:57:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 56d80832f84e6f364c8344223b3007b5 SHA-1: b06c8ee754d51e0513661ad5a83819853b2fa84d SHA-256: 8c22ba1b2a42725fdf357b16f4d8d86d35b6e15328f62da1a8dd6bf7ce0c8a92
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is classified as malicious by multiple heuristics and an ML classifier. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'Ragdoll volleyball unblocked 66', likely a pretext to drive traffic to the malicious sites. The presence of many links on disposable hosting further supports a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=ragdoll+volleyball+unblocked+66 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4471690/normal_5fd0fad600a86.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/eakjbge/32944115234.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408355/normal_6006f215412b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423195/normal_5fde8205d63e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384154/normal_6018e12577bd8.pdfIn PDF document text
    • http://xonigej.mypressonline.com/saunders_nursing_drug_handbook_2020_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412583/normal_60349bfc93002.pdfIn PDF document text
    • http://nejenowavofol.22web.org/engenius_durafon_pro_manual.pdfIn PDF document text
    • http://goossyy.online/wijojuxamizipogulosotabet52km.pdfIn PDF document text
    • http://tesodip.iblogger.org/regadodusodav.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/hijcDH2/parent_portal_app_for_iphone.pdfIn PDF document text
    • http://lordtrans.ru/subafesakajevahyv8.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/c7ihpgg/vocabulary_builder_activity_early_china_content_vocabulary.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/gukunajadepo.pdfIn PDF document text
    • http://ottics.ru/arte_contemporanea_poliqxs8q.pdfIn PDF document text
    • http://tryporte.xyz/611428594168k5sq.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/74207452943.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mapureju.epizy.com/28719100731.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/62915822983.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/how_much_does_sub_zero_fridge_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/food_safety_guidelines_for_restaurants.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/viwezuratezani.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/piriga.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_off0000f3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 5360 bytes
SHA-256: 811333c40c78bfbf83587a5e16f6955f37e8757536b3e62ed30d02cf676a7481
font_01_sfnt_off00010613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10613 10676 bytes
SHA-256: e09aee407b62bdce62683c4c0b0dacf3a603982b3b6919f3301289081265a129

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