Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae97c1958c4c1a7…

MALICIOUS

PDF

68.9 KB Created: 2021-02-09 05:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2ff8dc428747be7f7ee2cce0dd614188 SHA-1: 7fae8ce2df0d65a71ccdbef0d0ab32ef166190bc SHA-256: eae97c1958c4c1a73307119f9f034899f5c2f7e8ac0be9c5d94302e54da834ab
184 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious, suggesting it's a phishing attempt. The document body, though heavily obfuscated, appears to contain text related to insurance policy cancellation, likely a lure to trick users into clicking the malicious links.

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wb?keyword=cancellation%20of%20insurance%20policy%20letter%20pdf In PDF document text
    • https://cdn.sqhk.co/luvunugoz/TO3kIhh/feselelugunulu.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/gj7GjbE/five_nights_at_freddy_s_4_games_lol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463266/normal_5fe3fa2a1226c.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/eieG7ig/loopback_address_range.pdfIn PDF document text
    • https://cdn.sqhk.co/sidogorego/iNbGhgc/riding_with_highway_pegs.pdfIn PDF document text
    • https://cdn.sqhk.co/rowojazur/0TXnkkg/gre_vocabulary_builder_ielts_vocabulary_builder.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/biihdjd/12390675674.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/jZhhftI/zumobobujuvete.pdfIn PDF document text
    • https://cdn.sqhk.co/wavafinudow/iUieggw/papisegezukexumu.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/62522590683vxqfn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453908/normal_60194dd3c161b.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/higexib/62034382588.pdfIn PDF document text
    • http://vojukew.iblogger.org/65803935449.pdfIn PDF document text
    • http://legivupipofu.66ghz.com/tuxenirob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411709/normal_5fcc72abbb1d5.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/h4M6jhd/fps_games_ps4_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://makijozexu.rf.gd/10653743193.pdfIn PDF document text
    • http://fulovefodib.epizy.com/treasure_hunt_clues_with_answers.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_off0000d27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27B 5156 bytes
SHA-256: 72f5e46e92c9ce13bd269376d0a75ea7c39d1e25713055c8bc6a5fdefee3e08f
font_01_sfnt_off0000e41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41E 10024 bytes
SHA-256: f601560f79cc96b1d15877bef08ef0a25204da7d7f572c84613d631204d63566

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