Malicious PDF — malware analysis report

Static analysis result for SHA-256 90af8819f6bef0d9…

MALICIOUS

PDF

71.2 KB Created: 2021-02-23 03:24:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2d42eba8ed65b6986241f999e9e7e1b5 SHA-1: 5d896dbc2134c9878eb2cff69435128d88bf0a18 SHA-256: 90af8819f6bef0d9013b73b651b5528d3498a36ceed0aeb9e77b7eeac5dd336c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, and ClamAV detected it as Pdf.Phishing.Trojan. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious intent, likely involving redirection to malicious 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 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://seumenha.ru/strik?utm_term=simple+indian+vegetarian+breakfast+recipes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416666/normal_5fec7cf0deac6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483082/normal_6000695953898.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389568/normal_5ff0d4636b101.pdfIn PDF document text
    • https://tedofejufada.weebly.com/uploads/1/3/0/7/130775935/wifovutew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5fd07a3a728a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409123/normal_5fc893271b6b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402014/normal_600778d62e041.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481417/normal_5fcb9f33ebe3e.pdfIn PDF document text
    • https://sezibuginodeso.weebly.com/uploads/1/3/4/4/134470526/8382518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_601b67b7553f6.pdfIn PDF document text
    • https://wigimosasalak.weebly.com/uploads/1/3/2/8/132814057/rirow-wenelesan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496592/normal_60214deb0945a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_601209159cf55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371244/normal_5ffccc76d9ca3.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/kabisebax/65329732922.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/android_camerax_camera_view.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_off0000d5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D6 5840 bytes
SHA-256: 23a41ab93c3cebff7e573b031c32e0dff2f255f9cb74d4e4833ee32f7e3e5f67
font_01_sfnt_off0000e9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AB 10624 bytes
SHA-256: a5744fdf6f5bf18969a115d1eff67cafa0c4ecc14792c752a381b8b7180ba98a

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