Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab8b68d66ed8f27…

MALICIOUS

PDF

77.2 KB Created: 2021-02-18 21:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6c6f64a4c34e4ed3d2a05e1563d4dba6 SHA-1: 60c66dfc314730e1dfbf8a03c8227b6e2fccbae9 SHA-256: aab8b68d66ed8f27041f423b5f2c4f02105cf7bd7ba5850059970b11bd772ec4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external links, including a significant number pointing to other PDF files hosted on various domains, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of embedded URLs and the overall structure strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/aws?utm_term=how+do+animals+show+their+emotions PDF link annotation
    • http://vugijow.iblogger.org/92786704638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5fdc0dda25853.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458848/normal_6004be4d55b0f.pdfIn PDF document text
    • https://jitebogegamoma.weebly.com/uploads/1/3/4/7/134761197/e207ca61f.pdfIn PDF document text
    • https://debamivuk.weebly.com/uploads/1/3/1/8/131871977/abbb10049ae0.pdfIn PDF document text
    • http://dodemawaj.iblogger.org/bevulitali.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390385/normal_5fcbbcf293428.pdfIn PDF document text
    • https://pigebatidi.weebly.com/uploads/1/3/1/4/131482999/569c2597d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472753/normal_5ff221a070f5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409827/normal_6006860ec2df7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462980/normal_5fcd870c147a1.pdfIn PDF document text
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/nuputozorazomopopa.pdfIn PDF document text
    • https://terovudomam.weebly.com/uploads/1/3/1/4/131406893/pudapaxulugebano.pdfIn PDF document text
    • https://vowexigap.weebly.com/uploads/1/3/1/6/131636774/4316196.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450040/normal_5feffe42b0327.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lifinevedilubu.epizy.com/bonuko.pdfIn PDF document text
    • http://bejopobu.epizy.com/motorsport_tv_freesat_tv_guide.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_off0000f2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CF 5120 bytes
SHA-256: 3ff5ba0f66c91a28c41b098658ad1738b411a999ec8ba5298d020ce49e5b99a5
font_01_sfnt_off00010417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10417 10552 bytes
SHA-256: cf294ca6b09f1a58056438d671639f37a381b4a774f94bb6d27236e766d91b48

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