Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dd254bdf25b290…

MALICIOUS

PDF

71.7 KB Created: 2021-02-16 09:16:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 007ab43b8689a1868c1006f7489e0c5b SHA-1: 7af09f5f35b7f1ed8d02c9931a7e4d81b2e2f35e SHA-256: 08dd254bdf25b2903a336d36021c33ce0119bd468a680e378112039bf00eaad2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, particularly the one related to resetting a soundbar remote, are likely part of a social engineering lure to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jacksth.ru/123?utm_term=how+to+reset+soundbar+remote PDF link annotation
    • https://generixa.weebly.com/uploads/1/3/5/3/135350481/8112607.pdfIn PDF document text
    • https://mazanotofubemiz.weebly.com/uploads/1/3/2/6/132681192/1209114.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/pajadawuwib-jutusabaxu-dabofiwawar-wusakalomibu.pdfIn PDF document text
    • https://bafumujem.weebly.com/uploads/1/3/4/4/134498711/wabonize-vupigukira-silanovogeguk.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/MEhgWgi/13913609593.pdfIn PDF document text
    • https://cdn.sqhk.co/jijubexovoz/cmegdgg/bokupebufokufidokuxos.pdfIn PDF document text
    • https://juxipibofo.weebly.com/uploads/1/3/5/9/135985723/sekevovojofug-tukuboxig-tunarosome-votovotowen.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/mifunawi.pdfIn PDF document text
    • https://nojamatisi.weebly.com/uploads/1/3/1/3/131384142/puterupiwevaza_jofijidapelu.pdfIn PDF document text
    • https://junobinedutuki.weebly.com/uploads/1/3/2/7/132712306/pigomoxeduri.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/3QhgbPm/35617280589.pdfIn PDF document text
    • https://cdn.sqhk.co/kipezipilojo/g0Vjejg/hungry_pigeon_instagram.pdfIn PDF document text
    • https://sivevaredewiw.weebly.com/uploads/1/3/4/4/134464028/25a8d.pdfIn PDF document text
    • https://pujonavow.weebly.com/uploads/1/3/5/9/135958036/4144754.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/votubukaxogilix/viganatu.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/37629338726.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/kofolabiluguboluwukafaruf.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/dubizorow.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/zowalolatadubir.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/zinuxozofezepudivikeweti.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_off0000dab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 5132 bytes
SHA-256: 0bc594788c2327fceb9de5805eb612e8d234186d54b2db425e35d548f563fdd4
font_01_sfnt_off0000ec20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC20 10596 bytes
SHA-256: aee57d107dcbaaa58ce92c8cfabbcd35e3591724ce9a195c2bb3321ec688c506

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