Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5885898eda7211…

MALICIOUS

PDF

96.3 KB Created: 2021-03-28 11:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 85be833955f702ee22caf37fb4dd2e63 SHA-1: 88883e017c581cb0448b660dd76f1cd749274a35 SHA-256: 4f5885898eda7211edddd3b938c325b08e9e74949af545f26578fccdc0c9f458
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/strik?utm_term=communist+manifesto+pdf In PDF document text
    • http://smartcoin.design/20723062532ld0od.pdfIn PDF document text
    • https://cdn.sqhk.co/jalosemuv/jevhjid/bmx_boy_apkmonk.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/icdwjd1/trouble_in_terrorist_town_android_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zijopenuxafi/GegfgfV/adult_swim_rick_and_morty_game.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/D8ifij3/27208998277.pdfIn PDF document text
    • http://tonagruz.ru/nfl_week_7_predictions_2018_bleacher_reportcoyzu.pdfIn PDF document text
    • https://cdn.sqhk.co/joziroluxu/hjfUijD/icy_veins_warlock_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zadexona/egf7Shh/senofobuxu.pdfIn PDF document text
    • http://zesamoa.online/heat_surge_electric_fireplace_model_adl_2000m_x_manualg86x3.pdfIn PDF document text
    • http://wasezaxopana.22web.org/zogexijofibu.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/vFZr4hf/76165513259.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/lonozote/rezuwenigomelatonovi.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/mawuwemewupufimuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a81b83bc-f422-43b1-b841-6792c498a70c/mutexevodasetuvezera.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/birthday_wishes_for_love_video.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/que_es_mejorar_composicion_corporal.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/wenawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef5c008f-2f75-42be-940f-e17fc7613851/41241367784.pdfIn PDF document text
    • http://temewafin.rf.gd/68382194535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ad30be-3df5-4be5-a9a1-d9dc7cb9982a/translating_grandfathers_house_word_choice.pdfIn PDF document text
    • http://noxagipuputop.rf.gd/65847380809.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_off00013df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF3 4964 bytes
SHA-256: 7700272803dd0e9792674c33c446f9d1b1df0db37adf77aa6181238d302c88e7
font_01_sfnt_off00014ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EC6 11448 bytes
SHA-256: 866162427fadb75a242045d09628263e2830359214ca1dc366b0d2015e9ea1e2