Malicious PDF — malware analysis report

Static analysis result for SHA-256 0222ca43a3daec61…

MALICIOUS

PDF

79.8 KB Created: 2020-11-26 16:36:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 99af6dda05819668b4a3dd6f22252857 SHA-1: 3d6b410b29f92415a0bd7397c4971a462f8cd091 SHA-256: 0222ca43a3daec6152d7c9dfccddac96d51050b848a905d37b2f7d69e9ed27c4
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, containing numerous embedded URLs that redirect to potentially malicious sites, including a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Naui scuba test answers', likely a lure to entice users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://cctraff.ru/strik?utm_term=naui+scuba+test+answers In PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/4c61868420cf3e.pdfIn PDF document text
    • https://kasifezozubitux.weebly.com/uploads/1/3/4/6/134657511/jutogopofufedex-zevanojonorig-libatilo-sujak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487888/normal_5fabfda236e0a.pdfIn PDF document text
    • https://fenatelelopowi.weebly.com/uploads/1/3/4/5/134510159/c4186a7bb8a731a.pdfIn PDF document text
    • https://zirodaxe.weebly.com/uploads/1/3/4/6/134611642/7c1af.pdfIn PDF document text
    • https://wupuvogobed.weebly.com/uploads/1/3/4/5/134507139/gujibitavukad.pdfIn PDF document text
    • https://luzolujimus.weebly.com/uploads/1/3/4/5/134505858/febitoxigis-bikezal-fumemijerotiraz.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/5bcffad9-11d4-42a8-9d3a-2bd8d96c2601/zindagi_ki_talash_me_hum_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d42f1595-e7be-4e2f-9d97-4e60a21891ae/hd44_tv96_football_live.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8c79de1-ca37-443a-9ce9-c0b0603aea1c/the_man_in_the_high_castle_tv_show_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b99ecd-b5ee-4ac5-85fe-9c24e7a02e81/kitabu_t_tevhid_maturidi_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7928345f-7727-47c9-8edc-aca2fa97c0eb/gegavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94fe55e0-6bf3-4063-85fa-baf06f55264a/43020651762.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_off0000fced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCED 4964 bytes
SHA-256: 20a56800eb873d88ffbcecd7a68525ac08c0a6af6f836d912f31ba05b7f6fbf7
font_01_sfnt_off00010df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF4 10772 bytes
SHA-256: 7d87b2f306d0297022df0b8bddeea72c41f2351f112a7c3c3dcec812821f4775

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