Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb44fac556579e4…

MALICIOUS

PDF

73.7 KB Created: 2021-02-15 20:32:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6d7abe84df746a008aa94f5903987e66 SHA-1: 9f4e37cb79f97cf83727cf69b228327924ab984b SHA-256: deb44fac556579e4e22f35cdffc406c481cf8548d81264a33f5407d1ee89cf56
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://druttle.ru/wix?keyword=earth+science+vocabulary+worksheet+answers PDF link annotation
    • https://derovidexaw.weebly.com/uploads/1/3/1/3/131382126/3e7d1ee18.pdfIn PDF document text
    • https://worejatejele.weebly.com/uploads/1/3/4/0/134095890/vonivirowotel.pdfIn PDF document text
    • http://kulibakux.iblogger.org/94416452823.pdfIn PDF document text
    • https://xowimigijik.weebly.com/uploads/1/3/1/6/131637135/seseza.pdfIn PDF document text
    • https://mufamemibota.weebly.com/uploads/1/3/1/8/131856380/1b32f0082d29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445128/normal_600261051f147.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480142/normal_5ff25a1f558ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_5fd22f3bddf29.pdfIn PDF document text
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/tegide.pdfIn PDF document text
    • https://ralirepiputup.weebly.com/uploads/1/3/4/8/134852471/a932c5dc1.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/simujix/nuseduxes.pdfIn PDF document text
    • http://vininotubosom.epizy.com/domozan.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/88652217723.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/loxudowuluwogozoteg.pdfIn PDF document text
    • http://liwubujuwu.epizy.com/xavamulakeleg.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/rudexuzawexepapilifozan.pdfIn PDF document text
    • http://bugixud.epizy.com/a._b._s._t_full_form.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_off0000e2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EE 5300 bytes
SHA-256: ed01ca8c1e7fcf2991909b8f364df865ff4154ebe4ce1bd05090d7e797e71ee1
font_01_sfnt_off0000f510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF510 10708 bytes
SHA-256: 0efd4fbb9bf49ba3c5b81bb96f3dcd628c2f57016cfe15ba6b4c3a1aaba52b16

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