Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9c6777c876eb89…

MALICIOUS

PDF

61.0 KB Created: 2020-11-23 12:05:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2e0e98bf02e6dbccd7f8376d64b479a3 SHA-1: 17b26c7ca7455446f0e1c7b683035defd6431750 SHA-256: 7d9c6777c876eb89b741a29ebe97f29b4ac44e4d1603c0e30e92806a6675f6b4
214 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, 'https://cctraff.ru/strik?utm_term=2003+toyota+echo+repair+manual', is likely used to redirect users to a phishing or malware-hosting site. The document body, though heavily obfuscated, suggests a lure related to a '2003 toyota echo repair manual'. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=2003+toyota+echo+repair+manual In PDF document text
    • https://newususop.weebly.com/uploads/1/3/4/8/134893013/2191bb50e4871f.pdfIn PDF document text
    • https://zijunuriv.weebly.com/uploads/1/3/4/8/134892089/bumupubelupaxi_leluxuz_ruboj.pdfIn PDF document text
    • https://fegoparowewara.weebly.com/uploads/1/3/4/3/134321013/kopodigesenurabub.pdfIn PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/xujafavajojovex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a0f328-1ea5-46e7-8194-d3b8dd46d893/47709909140.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/kuvazotafutabatikozegul.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/ark_survival_mobile_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d671f0a0-a80c-4a25-8a65-5f4c1fe64cbc/vefisetoselopuxagisa.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/carrier_psychrometric_chart_english.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/xoziruwurogako.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/78548224529.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/friday_tv_guide_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/xuvudunij.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/10562763876.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_off0000b30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB30B 5440 bytes
SHA-256: 68e97237f3d56f2bf35375ddb2e4b09d6dab73390ea8459a38042a1a36cdc924
font_01_sfnt_off0000c567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC567 9948 bytes
SHA-256: d372da8e245f2ab28626e4e679488bd6b8545344201ebaac5763adfe092992b8

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