Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2c72b7093ac031…

MALICIOUS

PDF

73.3 KB Created: 2021-03-18 18:25:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6d685e4f6cedb00a2668b71f8d70265d SHA-1: 34d29719f37003d98dd63884dffb455ac2fb2248 SHA-256: ee2c72b7093ac0314623beedba91d60733a72aac0e0898e27d71d23d6e55f0dc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/award?keyword=standard+form+to+slope+intercept+form+worksheet+pdf PDF link annotation
    • https://cdn.sqhk.co/butiluluvuk/ghjipge/jofutiju.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/idH4jeS/maniter.pdfIn PDF document text
    • https://cdn.sqhk.co/mewovegid/NmN6ijh/48202549432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476941/normal_5ff16b6c42cc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_60174e428a468.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/0gfhhf3/44985748171.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/45zWibY/61426942575.pdfIn PDF document text
    • https://cdn.sqhk.co/kixepijap/faWgggj/smart_alarm_clock_premium_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xorazasuno/iggxyhj/sql_tutorial_w3schools_create_table.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476147/normal_600f9b00c472e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_5ff23e0c61d6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0704a8a8-c4ed-4b9d-a7f2-e374ba3fd196/10593169819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a589cf0b-417b-4c18-8755-685c9c01a3dd/55720966712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b340f41a-ed7c-4819-8b17-ee7632ee4331/letratag_100t_vs_100h.pdfIn PDF document text
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_f605bc85ed5248af863144c8538ce90b.pdf?index=trueIn PDF document text
    • https://b9264059-5ce6-458a-812b-58b21e0c51d1.filesusr.com/ugd/9a3dc1_d5c0e4e316bc4bb99a9bbcfde0d90e9d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a92ab541-2505-4fe9-8270-3e0273fe8ebd/fl_studio_plugins_too_big.pdfIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_0dced058f9724d259782b4cbf5dcfca3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/46e54e3d-00be-49e1-9a6d-a6f9cd085b65/72518137997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a92bd2e1-50ae-4531-8ad1-2ac880dab337/where_can_i_donate_clothes_and_household_items_during_covid_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffdeebc1-0b13-4a10-b87a-2bd3d24abb6f/how_to_program_rca_digital_converter_box_remote_to_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7866c0f9-03db-4477-864f-250901598abb/sony_icf-cs15ip_remote_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbd47d1-c884-4617-88a4-3e7bf6a5fdab/nikon_p223_4-12x40_review.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_off0000e0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EC 5656 bytes
SHA-256: a99e7906f23dee2a4596520e71abea75d5a6e978e6b3300a3fc61aa71cc712ce
font_01_sfnt_off0000f418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF418 10384 bytes
SHA-256: 11bdc7fe0eef3363c2bf2cb2b513ec395bed6ad031c5a1691217954ac4b04510

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