Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6cfd47733ee3cf…

MALICIOUS

PDF

69.3 KB Created: 2021-01-16 21:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: de2e67c85f46924b78e92bca59fe2124 SHA-1: b90e0d45591d462a38d928ae420a378e78dc1fd5 SHA-256: 4f6cfd47733ee3cfa9deaf0ce2e4201b94d5f89e577668dbcd4908c39a6a06d4
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, with at least one identified as a malicious redirector. The ClamAV detection and ML classifier also indicate maliciousness. The presence of numerous links suggests an attempt to direct users to potentially harmful sites, possibly for phishing or to distribute further malware. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=north+states+supergate+extra-wide+gate In PDF document text
    • https://bupifepubeweta.weebly.com/uploads/1/3/4/3/134336259/lilotopisix-fazixirukuzogu-xuzof.pdfIn PDF document text
    • https://site-1193467.mozfiles.com/files/1193467/19226352212.pdfIn PDF document text
    • https://cdn.sqhk.co/fewukise/ij7ne2n/zojukusajekajekezewegekur.pdfIn PDF document text
    • https://xafadefuvabajil.weebly.com/uploads/1/3/0/7/130776308/toburam.pdfIn PDF document text
    • https://site-1176591.mozfiles.com/files/1176591/best_deals_on_tvs.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/bZjj4hd/strikers_1945_movie.pdfIn PDF document text
    • https://site-1168030.mozfiles.com/files/1168030/jisupupaput.pdfIn PDF document text
    • https://site-1248155.mozfiles.com/files/1248155/black_friday_movie_hd_720p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446781/normal_5fbad0d49d341.pdfIn PDF document text
    • https://site-1168247.mozfiles.com/files/1168247/mini_photo_studio_box_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415974/normal_5f9b752caf611.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/setaxilitozuko/club_penguin_mission_7_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/skylanders_cloud_patrol_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/91768767553.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/lonegir.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_off0000d022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD022 5352 bytes
SHA-256: d94d85c80d084279eecaa98eeee53f0ae267bd5f612ebe483e0086da8979855e
font_01_sfnt_off0000e270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE270 10760 bytes
SHA-256: 8fde6c0e6b58ec8538bc3c6603747ad9bd4696cb6e92a5c61e1b3373edd73be5

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