Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d460199fd477dc…

MALICIOUS

PDF

64.3 KB Created: 2021-02-19 08:36:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: af5ea3922832683d224a1a8b7a236cb8 SHA-1: 37c2ba9792a9bcf12ee4ef93882668421424480d SHA-256: 27d460199fd477dc34bef6f8bc101fd1955b9a07c0c7047db2da4590d4361b62
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 extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing page or 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://crophysi.ru/aws?utm_term=florida+collections+textbook+grade+10+pdf In PDF document text
    • https://cdn.sqhk.co/bodujemep/hgfiezW/sling_7_day_free_trial_sign_up.pdfIn PDF document text
    • https://cdn.sqhk.co/nijalemivowo/m3iahc8/farmville_2_tropic_escape_cruise_ship.pdfIn PDF document text
    • http://rujajabejeveto.66ghz.com/3092473086.pdfIn PDF document text
    • https://cdn.sqhk.co/bogijifaviba/mzngd6R/25022138277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392442/normal_600cb64da4036.pdfIn PDF document text
    • http://wuzafinof.iblogger.org/tamil_10th_guide_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/pometobab/g5id2f9/prop_hunt_fortnite_code_farm.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/cEoxtjb/my_journal_diary_mood_control_and_fingerprints.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gadivedu.rf.gd/27819339406.pdfIn PDF document text
    • http://sunoxif.rf.gd/cc_catch_heaven_and_hell.pdfIn PDF document text
    • http://vepilezora.epizy.com/gabudutejunowofoxezubij.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_off0000bec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC8 5744 bytes
SHA-256: d6c947fe80fd60fc19ec7978aabd4f7b5432de7f50951b4ab6a04b17544626d6
font_01_sfnt_off0000d26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26C 10076 bytes
SHA-256: 6eace0ccacbc18fb2cc6e5d8917889b488fdb9d585eb1ae3ec52b6439b286af2

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