Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4112ff0e97bae4…

MALICIOUS

PDF

82.6 KB Created: 2021-02-28 05:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 97e52b2ab696f4a954d4fd6fa100cde6 SHA-1: a406627ab12c0909a981e2165b24b7e5cc803f18 SHA-256: bb4112ff0e97bae4fd236c5597f09976281233c19c7db8c37b534cd6dc19bc7e
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The presence of a 'download' button lure further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/wix?keyword=striving+for+accuracy+examples PDF link annotation
    • http://drive4mclaneaustell.com/pdf_split_tool77hvf.pdfIn PDF document text
    • https://bokozimub.weebly.com/uploads/1/3/5/3/135326123/wibafamivopagax_dekuwupof_jiwujeza.pdfIn PDF document text
    • https://vedirivokezijil.weebly.com/uploads/1/3/4/1/134108565/35d2bb4cc41091.pdfIn PDF document text
    • https://jojusilinu.weebly.com/uploads/1/3/4/3/134343509/resofaramusuwimixuma.pdfIn PDF document text
    • https://mexobuvuxe.weebly.com/uploads/1/3/4/3/134369937/3b829c30eb533.pdfIn PDF document text
    • http://detonicufficiale.website/pdf_reader_for_pc_windows_7_ultimate3k0y9.pdfIn PDF document text
    • https://cdn.sqhk.co/jafakitiw/gejgwKE/futodopol.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/6073.pdfIn PDF document text
    • https://rivewatot.weebly.com/uploads/1/3/3/9/133999312/gawuvif-watitosojit-koxapi.pdfIn PDF document text
    • http://zitugaxusi.mygamesonline.org/47974928443.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/how_to_thread_bobbin_singer_confidence_quilter.pdfIn PDF document text
    • http://iwhite.space/9390257755vwwcp.pdfIn PDF document text
    • https://cdn.sqhk.co/lonubugogere/KhagZje/makanupere.pdfIn PDF document text
    • https://takibuvekinapix.weebly.com/uploads/1/3/4/4/134456834/feb997e58990.pdfIn PDF document text
    • https://bekodezu.weebly.com/uploads/1/3/1/8/131856725/babatel_woxolamukupe.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/haritada_kaybolmak_ka_sayfa6zt0p.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
    • http://sutexuvidag.myartsonline.com/master_of_orion_best_custom_race.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_off0000ec4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4B 5548 bytes
SHA-256: c8d6f0df6273aee473fdbfaf4be77e82909ebcf8f0ca49df2cc5713ad9575512
font_01_sfnt_off0000ff24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF24 15736 bytes
SHA-256: e6a12765c823e33f3edce4eb7bd6cf4a9deb81cdf2843b74d4b1db9291fdd6a9
font_02_sfnt_off00012f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F69 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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