Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab4a7a5877055546…

MALICIOUS

PDF

70.8 KB Created: 2021-02-16 05:49:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b2c566414d0624639238e7d6ad71d620 SHA-1: 1b0036e1a6a0e5a16a10cabc8094688da4b832a4 SHA-256: ab4a7a587705554606a1d9e931185e3a5fe95654c637412922247c14ddd936f4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external sites, likely for further exploitation or credential harvesting.

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/wb?keyword=how%20long%20for%20garlic%20to%20harvest PDF link annotation
    • https://kumenesasewoton.weebly.com/uploads/1/3/4/7/134773405/kegup.pdfIn PDF document text
    • http://copriyghtconfirmed.com/20324692992tvyu1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380522/normal_5fcce3ecf31dd.pdfIn PDF document text
    • http://uuuuull.space/tirowapate4vm4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463010/normal_5fe1f919b5828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468531/normal_5fc66c1596949.pdfIn PDF document text
    • http://jaraxusej.iblogger.org/1526080677.pdfIn PDF document text
    • http://dulexip.22web.org/beautiful_landscape_hd_wallpaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469105/normal_60195985ee7dd.pdfIn PDF document text
    • http://gisonanezoboru.iblogger.org/business_plan_template_excel_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444853/normal_5ff0161d68ddd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385030/normal_601c5e1e153dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497685/normal_5fd61eb9bc123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_601fd2d874ae9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481847/normal_60013c2192c1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402963/normal_5ffa14ad26394.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zamigunuzowa.epizy.com/81167671484.pdfIn PDF document text
    • http://mepefixo.epizy.com/cymatic_audio_lp_16_manuale_italiano.pdfIn PDF document text
    • http://kixarakukam.rf.gd/contemporary_management_theories_and_practices.pdfIn PDF document text
    • http://noxikemudenuma.epizy.com/28967736264.pdfIn PDF document text
    • http://nelasuvujosigow.rf.gd/docker_udemy_free.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_off0000d9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E6 5256 bytes
SHA-256: 214b88fd27fc5b37763da4f0951d74e47441858ad4c974a2a4cb3b6f722d7f83
font_01_sfnt_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 10060 bytes
SHA-256: e5f29ccbd8499ef45417ad5c6641e9dff15407a943bec64f3dde41febe93d035

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