Malicious PDF — malware analysis report

Static analysis result for SHA-256 da2e2f2b7c52dc6c…

MALICIOUS

PDF

73.7 KB Created: 2021-02-12 13:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0f48b678e899f5757e637cdcacffbfcd SHA-1: 92b0204130f38cd3588a29edd12fc9f7484f4727 SHA-256: da2e2f2b7c52dc6c6424f524e3068e1d7ccc155e834d157739df1825061aab8e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, characteristic of a link farm or SEO spam campaign, with one URL specifically identified as an external URI. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content.

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://druttle.ru/wb?keyword=dtms%20user%20guide PDF link annotation
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/zizewomozewifigulo.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/numumupikake.pdfIn PDF document text
    • https://lopomibuliwipa.weebly.com/uploads/1/3/1/3/131381919/nagoselodedu-baserisijoxem.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/lizum_sibim_rixelikegen.pdfIn PDF document text
    • https://fanolukexepafo.weebly.com/uploads/1/3/0/9/130969893/5226909.pdfIn PDF document text
    • https://nefolebar.weebly.com/uploads/1/3/4/4/134400051/8976d23f6fbc53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412195/normal_5ff87f10b9f1b.pdfIn PDF document text
    • https://bobefadapuxat.weebly.com/uploads/1/3/4/8/134858353/b52bf10be5e.pdfIn PDF document text
    • http://biomaniks.website/valivilixeg3pms4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464530/normal_602148af5043b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417145/normal_5fed2392903fa.pdfIn PDF document text
    • https://pafodezeba.weebly.com/uploads/1/3/4/5/134589846/jusivug_xejalozawi_doposamavopapi_sinox.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/sivajuri.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/rojalexipokadaz/ukulele_chord_chart_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/leviathan_guided_raid.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/vasule.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/zedas.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_off0000e3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B1 4900 bytes
SHA-256: 77b7daee1392bf7fd3c0902e54acacd5f5e4ca03c5daa31889ee317f884799e5
font_01_sfnt_off0000f44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44A 11108 bytes
SHA-256: 762efa1fcc0d89693fcd482dac21e40a24a887a416047c10e5b17521333f8f50

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