Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74f7df179ae0a6e…

MALICIOUS

PDF

74.0 KB Created: 2021-03-09 23:24:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8a0edd713c1f1c3d4b8d33ce5fbeb7f0 SHA-1: f433bde44245bd776ae918526636f60f9000bba2 SHA-256: d74f7df179ae0a6e3f80f6f38548746dbebce3f6cb7d4b3e862a1ea383227c99
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection scheme to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to educational content, likely to trick users into clicking the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jumiwimov.ru/wix?keyword=covalent+bonds+gizmo+answer+key+activity+b PDF link annotation
    • https://cdn.sqhk.co/jifigetuxu/mjhCIZC/75857318501.pdfIn PDF document text
    • https://cdn.sqhk.co/sozodumupof/dTAgji7/96291761357.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/pifjdU8/59199261930.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/8LosIUv/praise_and_worship_songs_lyrics_and_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/ChirMjc/47992308611.pdfIn PDF document text
    • https://cdn.sqhk.co/zedozomi/iheKN2s/malayalam_funny_whatsapp_stickers_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/igjg803/tawax.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/jzQbOif/7492861481.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/ggif4ja/75597237969.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/Ajj8Ohg/final_fighter_mod_apk_obb.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/jgLjizX/new_syfy_tv_shows_fall_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/jI7ifwW/icolour_color_changing_eye_drops_before_and_after.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/zeworibuzoza/zajamozane.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/vintage_sofa_3d_model_free.pdfIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_eef77dfe86be4a318700a6a523965cb8.pdf?index=trueIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_ffa4da89b81d4a4883c81743a1d6a58e.pdf?index=trueIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_5133615daaef4cb0b0b3606e414f1e3f.pdf?index=trueIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_148d078c57ca496f9bd24434ef3fcb9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zizene/chlamydia_information_in_vietnamese.pdfIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_c1726c31a6454baab4eddc84b760d1d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/turip/zerirulasuwirimedigemesid.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_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 5672 bytes
SHA-256: 8848bf68e6dada64e023a4eeefeb609d7adf5c433926b55490f88eea69e5be93
font_01_sfnt_off0000f731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 10348 bytes
SHA-256: 1f26bec92c33cf96a1aa44e6c0db9e128e39921078397aed7ee3673c8b6c73cb

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