Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e27f1655ad2850e…

MALICIOUS

PDF

78.3 KB Created: 2021-02-10 21:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 019656b1ff43089cdbef12513bb76cf2 SHA-1: a9f8c5e06d1ec17caf69db5c6a6a321ca76617e6 SHA-256: 4e27f1655ad2850e33b83d723b553bfc24b3fca348ba87b99dfebabd25b35449
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 0.9997

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/aws?utm_term=alesana+ambrosia+mp4 PDF link annotation
    • https://miwevedadig.weebly.com/uploads/1/3/1/4/131437981/63918.pdfIn PDF document text
    • https://cdn.sqhk.co/jagakutojut/gjyibcK/85013020121.pdfIn PDF document text
    • https://viwetefebelogup.weebly.com/uploads/1/3/1/8/131857445/1344086.pdfIn PDF document text
    • https://cdn.sqhk.co/gozafavapawu/ihfko2Q/subme_sub4sub_subscribers_and_likes_for_channels.pdfIn PDF document text
    • https://kuweperiti.weebly.com/uploads/1/3/4/9/134904821/leporibopig.pdfIn PDF document text
    • https://cdn.sqhk.co/vifewaxupito/jZl0tMI/archery_trick_shots_james_jean.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386613/normal_5fffc4e4c13fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kovilowab/dangerous_goods_shipping_document_template_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/joretaradezikikejogese.pdfIn PDF document text
    • http://vomajifinudunu.epizy.com/notixu.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/rogixapozarex.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/aprilaire_model_700_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/wanted_netflix_parents_guide.pdfIn PDF document text
    • http://vabizofolimise.epizy.com/41281706804.pdfIn PDF document text
    • http://lakelasu.rf.gd/sudak.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/62169986140.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/acousticsamples_uku_ukulele_library.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/9369469109.pdfIn PDF document text
    • http://varosuvavim.epizy.com/midezajosuropivatavib.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4B 4888 bytes
SHA-256: 17a240b52dfba475ef6a97eef74c12b4e0bea95bcffc08f9d34d40f714e4a616
font_01_sfnt_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 2548 bytes
SHA-256: 9e389a6b768e5e9880ea6011c39283348b68d6ffd354c17920a2f2e567b36666
font_02_sfnt_off0000f84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84C 10880 bytes
SHA-256: 620c041937d8af89f22f071a508534eb34403b3ededb46e367de307f4194e69a
font_03_sfnt_off00011d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D48 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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