Malicious PDF — malware analysis report

Static analysis result for SHA-256 9050ec8ea228f616…

MALICIOUS

PDF

82.8 KB Created: 2021-03-31 07:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2ece669df95e5e08fd1346e21fe3a233 SHA-1: dbf7c63c45e2ee1a903bcadcad67d8dda2f06b62 SHA-256: 9050ec8ea228f616403da0a5cfe5c6abbbdc7cfdd288f94e4e3bd5e80f210575
186 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 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 0.9954

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/wix?keyword=pokemon+go+new+apk+download PDF link annotation
    • https://xuduwenonotowud.weebly.com/uploads/1/3/1/3/131379268/9932876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_603d3d8b70ae7.pdfIn PDF document text
    • https://jozokuxig.weebly.com/uploads/1/3/2/8/132814463/a2341212499.pdfIn PDF document text
    • https://davijonixumitu.weebly.com/uploads/1/3/5/3/135349017/togekimuvene-mebadubuvowetis-jowaforunuze-baxizatixopemo.pdfIn PDF document text
    • http://custits.space/codependent_no_morevzq8d.pdfIn PDF document text
    • https://lafazomutege.weebly.com/uploads/1/3/0/7/130740298/9282095.pdfIn PDF document text
    • http://wgathering.org/javapapodupafedatojolukdd.pdfIn PDF document text
    • https://kibidabusiben.weebly.com/uploads/1/3/1/0/131070702/3175595.pdfIn PDF document text
    • http://handler-autoscout24.com/destiny_child_tier_list_july_2020ie0d7.pdfIn PDF document text
    • https://muverope.weebly.com/uploads/1/3/0/7/130776407/70f88f.pdfIn PDF document text
    • https://zafasasuk.weebly.com/uploads/1/3/4/7/134713251/gipewapabati_sawupovo_pedid.pdfIn PDF document text
    • http://dominis.xyz/canon_powershot_sx710hs_price9m17a.pdfIn PDF document text
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/wetirevanexato.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459464/normal_603e7c16aa3af.pdfIn PDF document text
    • https://patewolenapew.weebly.com/uploads/1/3/4/5/134525441/d93ac4.pdfIn PDF document text
    • http://parkingtest.xyz/5505380203lkd19.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/e8a3eee0-d678-47d5-966a-48fcc021c7a4/what_are_rock_strata_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2668c9f8-c94b-4f8c-ab12-cff2f7e19bb8/why_is_it_important_to_have_a_clear_speech_goal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a2c9573-2d92-4dc6-a86f-cea157e12a72/wordpress_download_link_add.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d7b5fec-8bde-47ad-801b-79d1fdb78082/2011_dodge_avenger_3.6_thermostat_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1955f36-144b-4491-a248-b56d0ce55b48/is_return_to_eden_on_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/184eb42f-f897-4a7f-9f6b-c096723a93d4/17_indisputable_laws_of_teamwork_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2723eac4-0fe0-4029-9365-908decddcbb0/bose_acoustimass_10_series_ii_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/939f3e07-84e5-4fdc-9b1c-2693dba98174/54803510911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b713e2-1221-44f9-a478-4fda28068a17/12442848471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde3e198-74ee-4f6c-af23-5310d219cced/why_do_i_have_a_gold_star_on_my_license.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A0 3084 bytes
SHA-256: 69944ff0cc0d0634fa893c4f5f19e0eea7b44cd50ebca0c04b850419f6778a92
font_01_sfnt_off00010398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10398 5164 bytes
SHA-256: c8bf57adbab79843a91ca52ffae569ea84c7c671da40ac660f60871e60e61169
font_02_sfnt_off00011531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11531 11364 bytes
SHA-256: 8509458d35ff40f180728d9dedf7bd4557efc085bd3bc9c1764409d1146d4e4d