Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a7204b31d3ad23…

MALICIOUS

PDF

92.8 KB Created: 2021-02-19 22:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 26e272a1ebe7d4c3718310a60697014f SHA-1: 3e3a2dcf6e5fdad77ac64d50144e44c064ab45b5 SHA-256: 59a7204b31d3ad23a89963cade6b6d3d5d541b6ab31ea0542d5e66c5e9143396
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a Cisco 7945 manual, which is a common lure for phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL likely leads to a second-stage payload download, which is a common technique for malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crophysi.ru/wix?keyword=cisco+7945+manual In PDF document text
    • https://cdn.sqhk.co/mofosalamo/ufijhgh/xumowijonasi.pdfIn PDF document text
    • http://legrand-spb.ru/nuxosavaruxuxomogamunncue2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474978/normal_5fd119e26072f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470389/normal_6017bb9482227.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421056/normal_5ff1776adea8d.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/hdwqieE/10390449375.pdfIn PDF document text
    • http://pshcomonhere.xyz/staphylococcus_aureus_diseasesgmv5k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446038/normal_5ffa76dbd70e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475563/normal_602b3d870ac16.pdfIn PDF document text
    • http://zerkalo-fugicar.website/96661249225iheo8.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/gerazogebizafadivelerehad.pdfIn PDF document text
    • http://mmuuue.space/weather_report_today_live_kolkatasmqyz.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/piradi/perforated_sheet_pan_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/71847329442.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/free_math_worksheets_grade_1_word_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/bachelor_of_business_information_systems_vu.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/6150160862.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/bhojpuri_video_gane_dj.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_off000131b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B8 5204 bytes
SHA-256: 38ec7d0eeab2787882931b3a81ddb7c38e6e1f4c01fa9436daf8f14d861aa7d1
font_01_sfnt_off00014368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14368 10244 bytes
SHA-256: 1701358cbdf2722b592d307724d23bddd2a2a116402a303f5dba8dbb2d471517

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