Malicious PDF — malware analysis report

Static analysis result for SHA-256 072c1b6783fea214…

MALICIOUS

PDF

66.9 KB Created: 2020-11-18 04:15:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4d6e03ecc7e2a91cb02e41c0a80453be SHA-1: da1195ad5f421df60ce0f0e41a7323463649aed1 SHA-256: 072c1b6783fea214831cac5319f8c6f0d8472dad54e832423a0c7878fae093f6
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://trafffe.ru/aws?utm_term=active+and+passive+fire+protection+systems+pdf PDF link annotation
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/2920430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376599/normal_5f8b76f3b18cb.pdfIn PDF document text
    • https://vukegodepobaxi.weebly.com/uploads/1/3/4/6/134676750/7002288.pdfIn PDF document text
    • https://bososafevibusup.weebly.com/uploads/1/3/4/0/134041518/9100616.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9653445.pdfIn PDF document text
    • https://zemovawid.weebly.com/uploads/1/3/4/6/134608463/935534e.pdfIn PDF document text
    • https://zazejisodixad.weebly.com/uploads/1/3/4/3/134359446/falorebenisupejowuje.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/moxekibupuru/voroxifusiduvufub.pdfIn PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/5162527391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39f2b9c-6b7a-40e3-8b45-653a14bd3591/45632133673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/190c40d2-d1f9-402b-83ed-dfc77a8db71e/barbecue_bible_smokehouse_beans.pdfIn PDF document text
    • https://s3.amazonaws.com/degerutisig/wojabezigefofatunara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2d3109-2c70-40e7-8473-c0eed41c9763/1031479403.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/ashrae_psychrometric_chart_metric.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC866 5420 bytes
SHA-256: 02772de5097cbe2fcea89629cffeaaf6a31827824a14b9778cb78f1dd116b6d2
font_01_sfnt_off0000dad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD5 10060 bytes
SHA-256: 2aed609b28994680321f729e7da530320ffe205dec8d28dc59248340f2ad85f9

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