Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7aca582b778a0d8…

MALICIOUS

PDF

76.1 KB Created: 2021-03-25 02:20:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea706554f7db231514d39f5cd0d8effa SHA-1: cc5c529d82c1c0467c342c61aed22346b78708db SHA-256: e7aca582b778a0d8ba83ebf7e18eb063425cfb1688697c9e2bafef524c46a190
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to direct users to malicious content or download further payloads. No scripts were extracted, but the presence of numerous URLs points to a content-delivery or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/award?keyword=affairs+cloud+monthly+current+affairs+pdf+2020
    • http://xulodol.mygamesonline.org/muwekemonaxexofubumawik.pdf
    • https://cdn.sqhk.co/lagitesavap/hg24Cjh/tamop.pdf
    • https://cdn.sqhk.co/gunonutib/WgexjdZ/cartoon_network_apple_and_onion_competition.pdf
    • https://cdn.sqhk.co/mipijotom/IjcadWW/freeway_closures_southern_california_today.pdf
    • https://zeruposizagaki.weebly.com/uploads/1/3/4/8/134854722/bajejoxigikizazofej.pdf
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/kezaseruruzika_dedupiro_joxit_posifofobel.pdf
    • https://cdn.sqhk.co/bisuligiga/IieEHja/crossfire_2_scope_4-_12x44.pdf
    • https://cdn.sqhk.co/kewixoretuze/hsji9je/sci_fi_movies.pdf
    • http://nopotaz.medianewsonline.com/what_does_abigail_mean_in_chinese.pdf
    • https://cdn.sqhk.co/gavonenegave/c2hdEY3/iphone_weather_app_default_city.pdf
    • https://sivasanetit.weebly.com/uploads/1/3/6/0/136095735/fesivetaxek.pdf
    • https://kisujaxu.weebly.com/uploads/1/3/0/7/130775962/1a8f54227297.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_682b99bd21eb428eb403cef3c0751d2c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e236fdfd-27bb-45c7-a5e0-6c487c3837a6/32803907376.pdf
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_f9af433db5204cdf9ab3c3d54a57b77c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c91fc208-fb6d-475f-a09e-6b7dc99f05e7/13002316506.pdf
    • https://uploads.strikinglycdn.com/files/dbe044c3-4b3c-4a89-8b77-22844b82cd36/zegafitamozapurubateliv.pdf
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_11dac66cdc194fcea475bc53cc2524a8.pdf?index=true
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_a841e5898edb4790ba340627137c3092.pdf?index=true
    • https://uploads.strikinglycdn.com/files/69097ed1-4fc7-40f9-867f-14c35ac9d61c/95736058429.pdf
    • https://de26864d-dd79-4a6d-8467-b5cf435a6969.filesusr.com/ugd/6ff07c_88ffdbe697ef4761996a42a7c75e7a8a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/893622ac-2a9f-44a9-ab29-98a2df1f0095/dell_optiplex_9020_motherboard_schematic.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e90d.bin
c8a131ffc8f915011dd04a12fc8ffdf7de71396639fa95639b69a56d628432be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE90D 5760 bytes
font_01_sfnt_off0000fc91.bin
dc34f4b5ed330782f6d5f0b5d795cdff419d20466b586455f9abd0b617bc1416		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC91 11016 bytes

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