Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da9d55ebd57d727…

MALICIOUS

PDF

58.1 KB Created: 2020-11-14 16:12:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1d277820e8672331de0d2fbc6eb64844 SHA-1: 1a53b011c89ab410b5f9a6c2770fe30fa490511e SHA-256: 6da9d55ebd57d727e8ac026cb9f7c087065b9952c02e4719e6c222d169195626
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically pointing to 'trafffi.ru' and a query related to 'what is nespresso alto'. This suggests a phishing or content-luring attempt. The ClamAV detection and ML classifier flagging further support its malicious nature, indicating it's likely a phishing document designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/123?utm_term=what+is+nespresso+alto PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410678/normal_5f9d232f534fb.pdfIn PDF document text
    • https://fafexozoruxefok.weebly.com/uploads/1/3/4/5/134527426/pawakaguxigagejami.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/favepin.pdfIn PDF document text
    • https://xulalotuk.weebly.com/uploads/1/3/4/5/134593582/5d6a3b238e.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/c62ab695cfd.pdfIn PDF document text
    • https://sipexagugiresu.weebly.com/uploads/1/3/4/6/134607427/rekagarid.pdfIn PDF document text
    • https://vakesefujes.weebly.com/uploads/1/3/0/7/130739027/disaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_5fa67617a4f87.pdfIn PDF document text
    • https://dudererojafa.weebly.com/uploads/1/3/4/3/134362298/1819513.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/tobobowu/favewusar.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/infinity_middle_school_address.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/93534528354.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/unblocked_shooting_games_download.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_off0000ab22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB22 4920 bytes
SHA-256: 20fbf1f353007b70bfafc199d5deaddf6463d7b0ec37b76191978926b08c93c3
font_01_sfnt_off0000bbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE3 9440 bytes
SHA-256: 2fec3168ca881c7d82c89c90730c4ce9279b5aecfaed45ad15ba4ade91701d10

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