Malicious PDF — malware analysis report

Static analysis result for SHA-256 556ecd3c8dd8cf82…

MALICIOUS

PDF

73.7 KB Created: 2021-04-26 01:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 978d7e12f6af1b73f55702fb3db3800c SHA-1: 30ab090f7fe58e69024edb90ef701796d4494da6 SHA-256: 556ecd3c8dd8cf82e9e9b1758751e5fac96b04f7d7ced5f2d2d92812d816ff1f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://lozipotod.ru/strik?utm_term=ukulele+club+santa+cruz+songbook+pdf PDF link annotation
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/7db54.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/3387492.pdfIn PDF document text
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/8301852.pdfIn PDF document text
    • https://cdn.sqhk.co/xusovatovu/OiigjLs/lufunanuw.pdfIn PDF document text
    • http://tosety.xyz/xiviratesewujulazexehg727.pdfIn PDF document text
    • https://fuzidofan.weebly.com/uploads/1/3/2/6/132695445/goxiwopin_japigumebeved_finowu_nanidebapowifa.pdfIn PDF document text
    • https://fitarerak.weebly.com/uploads/1/3/5/3/135313257/wesutejosisuwiwi.pdfIn PDF document text
    • https://linebabeta.weebly.com/uploads/1/3/5/3/135317009/jipuxugetuba.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/Ijjifjf/zokojatabolenoj.pdfIn PDF document text
    • http://smeshnoykir.space/animal_farm_book_chapter_3_and_4_summaryh1v4u.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/0ihgjhe/how_to_chrome_on_macbook_air.pdfIn PDF document text
    • https://katalulipof.weebly.com/uploads/1/3/2/7/132710678/zerudivemigobi-guzirinipowi-gifujekur-bodipelomikumi.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/sqQjjMv/anime_the_last_battle_of_the_cosmos_pc.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/vabedafozo/jefixelatuwono.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/munirivezawumurowot.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/27768123777.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/asus_rt-n53_dual_band_wireless_router.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/woolsey_fire_news_report.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/felilutugezibolas.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/71742348310.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/12176934824.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_off0000d8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E8 5568 bytes
SHA-256: 031040c35df7a76fe6a8357c500fb038d2584a5f66496160d63ed957544a87b3
font_01_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000f477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF477 10188 bytes
SHA-256: f3971ba96771dae21f14ec0a5f0a15e0164b00451b4a6dedbf47ac508970c268

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