Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ab8f28d6ba2bdb…

MALICIOUS

PDF

66.6 KB Created: 2020-11-20 07:33:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ac77d475c1dbb967b828643504ae185e SHA-1: 1bb421dd623151a9df39ec0f4908f93d636533b2 SHA-256: 65ab8f28d6ba2bdb258ee7f86842a6acd1a468d5d8d08b94a3e6c0190fdf091c
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. This suggests the document is designed to lure users to malicious websites, likely for phishing or to download further malware. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://cctraff.ru/aws?utm_term=asphalt+xtreme+1.+7.+0g+mod+apk In PDF document text
    • https://raminatu.weebly.com/uploads/1/3/4/5/134579417/c876c910.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/c409d22d7f31c56.pdfIn PDF document text
    • https://lidikizibapusak.weebly.com/uploads/1/3/4/8/134883913/tiguludalub.pdfIn PDF document text
    • https://sipedevesebin.weebly.com/uploads/1/3/4/8/134879103/feduvudogewavov_tinekebowo.pdfIn PDF document text
    • https://rilemiwekeb.weebly.com/uploads/1/3/4/5/134599700/duxagenofivodif_zadasexinola.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/tiduro/anaconda_4_movie_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/new_odia_song_2018_video_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/400e01a6-a77e-4fe2-9224-d26f9de2890a/wugakoregaposonarafo.pdfIn PDF document text
    • https://s3.amazonaws.com/potevip/psu_odin_account_manager.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_off0000c4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BD 5800 bytes
SHA-256: 8846f304fdccc557ab96e36e0858664fd2c1cb9c07a23d4135fbdbbabb0ff152
font_01_sfnt_off0000d869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD869 11104 bytes
SHA-256: 312f3c5487e497088b9863181437542c302dd026fbd12c3d46d52b15d0368bf0