Malicious PDF — malware analysis report

Static analysis result for SHA-256 6209c09eadb6875e…

MALICIOUS

PDF

75.5 KB Created: 2021-02-24 20:22:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0ed400df98418e9f5991bd5182e60973 SHA-1: d6f8fa557ccdc8e4e805aa0fa14686d0b215a9ff SHA-256: 6209c09eadb6875ee5eb75498947c84c3862ed66a446ef0f268d16c4f21482c0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one prominent URL leading to a search result for a 'frigidaire refrigerator user manual'. This suggests a phishing or scam attempt to trick users into visiting malicious sites. The ML classifier and ClamAV detection strongly indicate 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
  • 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://crophysi.ru/strik?utm_term=frigidaire+refrigerator+user+manual PDF link annotation
    • https://fanesorugetefex.weebly.com/uploads/1/3/1/3/131383934/dekezevomid.pdfIn PDF document text
    • http://wuderiwewilew.22web.org/47978582739.pdfIn PDF document text
    • http://vupikevuga.iblogger.org/34986635458.pdfIn PDF document text
    • https://zegekeli.weebly.com/uploads/1/3/4/6/134616407/6237464.pdfIn PDF document text
    • http://fufivepibagat.iblogger.org/hemoglobin_a1c_conversion_chart.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/pipaneku/97058821516.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/3802296402.pdfIn PDF document text
    • http://pinakebe.rf.gd/luxifiwavivujoxiti.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/19242382921.pdfIn PDF document text
    • http://zugujegezamuto.epizy.com/video_from_facebook_app_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/25277950968.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/maxubopilaworonagesopi.pdfIn PDF document text
    • http://jimotomalugeji.rf.gd/bahubali_movie_hd_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/hypothermic_arrest_guidelines.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_off0000eb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB36 5184 bytes
SHA-256: e683500a193c613ba69cc47843b52e3e5e2ccd13fb9603519c3dbdbcd30abc5d
font_01_sfnt_off0000fcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC9 10552 bytes
SHA-256: 77b532222911aad1afa01594e401a8259ac6c38a425634211ffe85c1b7662b80

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