Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ab32dc25e8ae23…

MALICIOUS

PDF

66.8 KB Created: 2021-02-23 03:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 833e06aa17ed2d0f4187ce7d8744d0d3 SHA-1: d40ee77de62106202f0097af61f292ce9dc2f7fb SHA-256: c7ab32dc25e8ae231dcb86bc764d0bc9182babfb584158572152e41ce45be974
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 overall structure suggest it's designed to lead the user to malicious content, likely for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?utm_term=common+core+ela+language+standards+grade+7 In PDF document text
    • https://cdn.sqhk.co/suxupijisajo/c1ZieBv/xabusarumazeranexupodelil.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/id9rr0Z/miduvorufubigatisizila.pdfIn PDF document text
    • http://pubomoxagu.22web.org/microsoft_powerpoint_presentation_templates_2013_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/iWMhdW5/ludo_king_hack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/puwipaneke/9AihOe9/large_asteroid_near_earth_nasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_6023bd6937679.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/fphbgcI/robotics_notes_switch_australia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384304/normal_601ca3cda9749.pdfIn PDF document text
    • https://cdn.sqhk.co/pasezateda/ifgjJig/dofej.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/hidohhf/flights_to_hawaii_from_houston_round_trip.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/gTohaji/solar_system_definition_quizlet.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/cibhcid/bimogoluwubume.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/ghVifqF/cover_orange_games_4.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/jX6tQha/tamil_rock_ringtones_free_download_80s.pdfIn PDF document text
    • https://cdn.sqhk.co/nunemiziku/gjEUrjc/73582854771.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jupanadipi.rf.gd/compound_adjective_exercises.pdfIn PDF document text
    • http://wutodabegaf.epizy.com/70413973127.pdfIn PDF document text
    • http://bepinutarefe.rf.gd/49770978137.pdfIn PDF document text
    • http://kixixiwibatogit.epizy.com/22552399008.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_off0000c9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FF 5244 bytes
SHA-256: 504ff57552f24c49639c857140d5d7239b5ec73a00644864b0b140cfaadc3514
font_01_sfnt_off0000dbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB9 9984 bytes
SHA-256: 277c53c533ccb435865d353517d1cb288113afe6b5878e75bde56cff55ed29c3

Open this report in the interactive analyzer, or submit your own file for analysis.