Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a911f2dcef6da6…

MALICIOUS

PDF

68.6 KB Created: 2021-02-22 02:56:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 23ecba22d848facce36290c980ce467e SHA-1: 5273a746ce005d5174b8dc898908419d58c8e045 SHA-256: 34a911f2dcef6da6fd115d7a59369b98adbbd519c2de21835756d352bd6b2905
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=afghan+hound+puppies+for+sale+in+michigan In PDF document text
    • http://lbaranaydin.com/la_danza_de_la_muerte_stephen_king_gratisdlcwp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5ff6a4c92eb6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_5fd760b882838.pdfIn PDF document text
    • http://supermagazforsale1.xyz/walking_dead_issue_19292shh.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/xesigeze/18237971643.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/report_on_floriculture_in_nepal.pdfIn PDF document text
    • http://pozimewugojezi.rf.gd/how_to_write_a_building_maintenance_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/numl_admission_form_fall_2018.pdfIn PDF document text
    • http://susesibukof.epizy.com/dress_pattern_making_books.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/simple_english_test_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/69577531436.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/dumek.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/humira_complete_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_off0000cfc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC8 5556 bytes
SHA-256: 23bdc7579cbc47dd6329e237ab7232094d869f0485fd6fda5773db76a843472f
font_01_sfnt_off0000e28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28F 10308 bytes
SHA-256: f75b731a4908fc4578e2332e4e0b11bc92a1cefcb0867569ec359e97a6b41cb0