Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7915cd53bb485d…

MALICIOUS

PDF

93.3 KB Created: 2021-02-25 06:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c79585c089d499698651cd9023c16328 SHA-1: 8a9b85a0f3b228c046db320f214f0be83198443f SHA-256: da7915cd53bb485df9bd8c15902652f0493e84f6a619b7c2cb80218c68ac7c35
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to educational degrees, directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://leonvi.ru/strik?utm_term=where+can+i+get+an+interior+design+degree PDF link annotation
    • http://bcipreactivaperu.com/gujojilorarawuzevuduwiobx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386361/normal_5feef946b830d.pdfIn PDF document text
    • http://vashobereg.com/how_to_draw_anime_hair_girl_shortonzdm.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/alpha_word_in_urdu_alphabet.pdfIn PDF document text
    • http://3203epworthcres.com/compressor_de_free65kzr.pdfIn PDF document text
    • http://gmetry.online/36946444472uyosq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388420/normal_5ff1951cbff59.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/80544592048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_601bfad2ec783.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bifovigavij.myartsonline.com/6679810305.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/11855459844.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/koridesuxuwejurajijum.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/34197217822.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/night_owl_optics_nobg1_night_vision_goggles.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/gojim.pdfIn PDF document text
    • http://zevusup.atwebpages.com/67999210062.pdfIn PDF document text
    • http://dogazuzi.epizy.com/inventory_list_with_photos_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/does_porque_mean_why.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_off00013075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13075 5180 bytes
SHA-256: 5d1d0c5801996438ea6e08efed65a0645f2c542d1cd085c5192f2f20352f2a06
font_01_sfnt_off0001421c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421C 11128 bytes
SHA-256: eb064ff5bbd822a7a5c52171a1553f68843582a12dd2206ed4f968332bd324d1

Open this report in the interactive analyzer, or submit your own file for analysis.