Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19d27de600cc42f…

MALICIOUS

PDF

89.2 KB Created: 2021-03-18 03:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f59bbafb175a89f51507cf3311267f0e SHA-1: ea7afeeafc244dfb9a5f02638b8e88dbc1cf0d74 SHA-256: b19d27de600cc42fa0828c03deef31763eae24148920aee1445f2089a71852e7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains strings related to 'Area 51 news report naruto run' and 'wkhtmltopdf', suggesting a lure to a potentially malicious website. The presence of external URIs and the link farm heuristic indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 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://nipisod.ru/123?utm_term=area+51+news+report+naruto+run PDF link annotation
    • http://fionainthefield.org/88378338576d8qwp.pdfIn PDF document text
    • http://marketeuro.pro/sekiro_endings_guide_no_spoilerso9yhf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425768/normal_5fcb01bdcecc4.pdfIn PDF document text
    • http://sweetmeet.online/miweguvofajiluxabn77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470681/normal_5fd3c0ae5b9c1.pdfIn PDF document text
    • http://tur8osale.site/tutorial_javascript_20186yps1.pdfIn PDF document text
    • http://operationhomeplate.com/navy_blue_puffer_jacket_ladieseslge.pdfIn PDF document text
    • http://fredo.run/71341253687vps5f.pdfIn PDF document text
    • http://d2-club.ru/lirixado99j7.pdfIn PDF document text
    • http://tekchambre.xyz/ruwupulakeqt9a3.pdfIn PDF document text
    • http://shoppingyxplus.xyz/autocad_2021_tutorial1711e.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/ibPhfjb/bushmaster_carbon_15_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376354/normal_60066c7750196.pdfIn PDF document text
    • https://cdn.sqhk.co/vorinugobol/jdHfKjg/start_hp_laptop_in_safe_mode_windows_7.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://s3.amazonaws.com/zupenafud/gagaloj.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/vezitirekukijadigoteser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d339de05-bbde-4570-ab34-80af835d6c0c/lexepunok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a51e3395-f423-43ac-bf25-7f877186ef54/physics_textbook_class_9_telangana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b95230-7171-44eb-8038-68cf0ea9000f/gy6_engine_oil_change.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/91501474135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4b26c1-3d69-4348-8e3a-eb050812bb87/melhor_magnesio_para_tomar.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/puerto_rico_gran_canaria_resort_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2b6ecfb-ed6c-433e-bcf9-adf4b89648cb/52724286138.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5D 4872 bytes
SHA-256: 759ece60e54e80b76b4a5da43c53a7e121b6927399362d3473c6b0189221be40
font_01_sfnt_off0000fd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD03 4120 bytes
SHA-256: 51fce001d538d87f6efe90392e8030a3e62633aca6dbd03ef0a3877501e2e200
font_02_sfnt_off000107f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F0 11900 bytes
SHA-256: 04dd30c26335ccdc2471a95c47110dd0017a1ea0f67e2f0d41fda1e564bd14de
font_03_sfnt_off00013094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13094 16548 bytes
SHA-256: adda0b0380b710ebf0c1d7624c579e9292c638228efd0fa11be61117a9fd29fc
font_04_sfnt_off000146ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146ED 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378