Malicious PDF — malware analysis report

Static analysis result for SHA-256 1534696aafd67011…

MALICIOUS

PDF

77.3 KB Created: 2021-02-11 15:31:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e576eb7e14289530a8b6e5607b9eaf3a SHA-1: 982476068ccef8d94d670b6f38e7391a06550b00 SHA-256: 1534696aafd670115fdb4eb1e32b059bf4469b3aa6f8fb9ab87c9248d2f4cdb8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firing for a malicious redirector suggest the document is designed to lead the user to a harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/123?utm_term=10.2+the+process+of+cell+division+study+guide+answers In PDF document text
    • https://cdn.sqhk.co/pafevola/ggrhhex/billionaire_capitalist_tycoon_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_6012df643f16c.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/cYahggj/dilediralivoberuvegozuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490380/normal_5ffdc5d7abb88.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/ghjjjg9/37540031547.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/i3gc2Ei/new_bike_hero_xtreme_price.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/xg0mhjJ/73709923788.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455208/normal_5fe4500535998.pdfIn PDF document text
    • http://kugitipozad.22web.org/97838314439.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450434/normal_5fec257035244.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379611/normal_5ff1d72763b0e.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/rge2xih/47865715320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403807/normal_6014bbe74d06e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421224/normal_6024fc1aa7dc7.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/iigjwjj/airplane_crash_reports.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://voperafabekom.epizy.com/21253421144.pdfIn PDF document text
    • http://luturuwuxas.epizy.com/android_recyclerview_adapter_in_fragment.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/avery_laser_labels_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26B 5816 bytes
SHA-256: 785d26cdbac293ca1f017d248821e5f88c8bccbcea659416bea06ad98ff60991
font_01_sfnt_off0000f653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF653 10308 bytes
SHA-256: ddd6a6a6406bd496d645d3eadc4263d9be7cae383c8a4c391f38400da0a11fd4
font_02_sfnt_off000119ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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