Malicious PDF — malware analysis report

Static analysis result for SHA-256 a720c47d7c9fc189…

MALICIOUS

PDF

109.9 KB Created: 2021-04-18 09:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: aa6aa69da62613c412d1216cbdd137f7 SHA-1: 813afc349dc68a76ad0d3043cfef1a0919b641de SHA-256: a720c47d7c9fc189e7a95c973407acd0a6e9ab4891a651e9a0a4d1ac98b4ae8d
126 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'dugedepap.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://dugedepap.ru/strik?utm_term=how+to+train+your+dragon+toys+walmart+canada PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493873/normal_6048261248d94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_6044cdc3de6a5.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/how_to_use_a_scosche_wireless_car_charger.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_605d6e0083ac7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456389/normal_604e1d83c404b.pdfIn PDF document text
    • http://zasazigupat.getenjoyment.net/20306958001.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/91c29801-e946-423b-ac40-c1b9bae087c6/zafage.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/defukadezozisajawo.pdfIn PDF document text
    • http://kijonag.onlinewebshop.net/acca_f9_study_text_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/045b2e3b-c348-4839-9daf-dd8a3dc0c510/how_to_write_my_employee_evaluation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccfef7d9-7774-4cb1-8ab7-e7387b669473/what_is_the_size_of_an_ipad_mini_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e5322ea-9d1d-470b-8a93-cd8a1c343315/the_spectacular_now_full_movie_online_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023e196c-6ef0-4ce9-a3fd-cd82c87174b6/kezanuwepugelet.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/45795848885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/745048d7-1b57-4027-aecb-b5b21d0c3064/suwob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea7bab49-033e-4129-9b30-a3db02955c90/home_beauty_and_the_beast_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df82a1d-7a00-497b-a96c-3dcc0eb0d72a/modaxujod.pdfIn PDF document text
    • http://bexalawisilinot.epizy.com/adolescence_medley_drakorindo.pdfIn PDF document text
    • http://dofemotesatur.epizy.com/bupopibusoz.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_off00015e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E0D 5180 bytes
SHA-256: 7043a946989031da241d14edcf78be803432b28deec4bb95e59957abe9bf74db
font_01_sfnt_off00016f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F98 12480 bytes
SHA-256: f5704ba08f1fb89135ce2caf962c9ee7f80ff74746a1f6b3c6f6c7326f4ad7de
font_02_sfnt_off000199c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199C6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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