Malicious PDF — malware analysis report

Static analysis result for SHA-256 349b044ad3e1bda8…

MALICIOUS

PDF

71.6 KB Created: 2021-03-15 21:22:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fb6f06c04fd3ff25b4eccf4c0626c3ec SHA-1: 5133cf77431d1f8cfd08ed210be93db3a4742846 SHA-256: 349b044ad3e1bda80031fdbb71370b0703a2aa96d91188e6f24acd729d7fe452
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as https://mezovuduw.ru/wix?keyword=lafayette+jefferson+high+school+bell+schedule, are likely used to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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.
  • 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://mezovuduw.ru/wix?keyword=lafayette+jefferson+high+school+bell+schedule PDF link annotation
    • http://penimira.iblogger.org/sanerekixobanitevazof.pdfIn PDF document text
    • https://wojanoxunoliwam.weebly.com/uploads/1/3/5/3/135394081/0be00ab81.pdfIn PDF document text
    • https://koxabiniz.weebly.com/uploads/1/3/5/9/135994092/fujim.pdfIn PDF document text
    • https://xemojunaxumig.weebly.com/uploads/1/3/4/2/134265853/e6285a6c6a94022.pdfIn PDF document text
    • http://dujifasuda.iblogger.org/smartsheet_help_articles.pdfIn PDF document text
    • http://paktum.pro/green_background_hd_images7k6hb.pdfIn PDF document text
    • https://vemujevamari.weebly.com/uploads/1/3/1/4/131452814/fodow-domubama.pdfIn PDF document text
    • http://emmetrix.net/37856957858dur8t.pdfIn PDF document text
    • https://ditiwuta.weebly.com/uploads/1/3/1/4/131483603/36b254f.pdfIn PDF document text
    • https://sosabugipos.weebly.com/uploads/1/3/4/6/134657522/rajojegumokiwu.pdfIn PDF document text
    • http://lngcliente.com/electrical_drawing_symbols4xbgt.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/792d5c423b.pdfIn PDF document text
    • http://yoganchik.space/jutuked9boac.pdfIn PDF document text
    • https://wuvumivew.weebly.com/uploads/1/3/1/4/131410662/389ddbff1b.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/dowadotiju/wacom_intuos_pro_medium_pth-651.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/falconry_hood_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/vipamevajunobizoworof.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/mann_mera_bawara_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b41449-d4bb-4db8-84aa-eafed0e730e2/donufojut.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/bekuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4947836a-fbe3-49f1-b7a1-2c99ecff03bd/43719069559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25d66dfd-f078-4008-99ac-a2197f138fab/ms-7778_ver_1.0_cmos_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/737525ed-e21d-4cfe-a552-adea9d060541/81642890265.pdfIn PDF document text
    • http://jujonejetas.epizy.com/batman_cavaleiro_das_trevas_animao.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8a4db1-e8e6-4ae9-a520-85b4db4352d5/foritajiketomi.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_off0000d8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 5544 bytes
SHA-256: e08d6456dfbecf33d70b019bd4339f3d5997d0b519f46e613bb99b8d0769caa9
font_01_sfnt_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 10944 bytes
SHA-256: b012b8f4463f2257b2eab502bb9ec941ced4ef26202b93e0d3f0310289bdb310