Malicious PDF — malware analysis report

Static analysis result for SHA-256 005a78c6a3bfed9d…

MALICIOUS

PDF

79.1 KB Created: 2021-03-28 11:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1e068e5809e329ed42726b62e62996e9 SHA-1: bb2e5bcf99a99039f27d237956187abd5c881258 SHA-256: 005a78c6a3bfed9d427ae810106e37f72bb64341a19308ae48b4066203f2b5c0
146 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of PRC/3D content and duplicate object bodies are common obfuscation techniques in malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://seumenha.ru/award?keyword=describe+cognitive+development+pdf PDF link annotation
    • https://cdn.sqhk.co/gotakavapu/jhhjhbY/hd_nature_wallpapers_for_mobile_1080x1920_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410000/normal_5fdc1218cd631.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/45040505815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420237/normal_6041f394df183.pdfIn PDF document text
    • https://cdn.sqhk.co/gajamomol/ghypieR/24333512445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383340/normal_60437dbf2e570.pdfIn PDF document text
    • http://bosuxezaxad.mypressonline.com/balance_sheet_exercises.pdfIn PDF document text
    • http://pokezokebawi.mygamesonline.org/84303696528.pdfIn PDF document text
    • http://zaranes.getenjoyment.net/kogimimawivobabixiwavemig.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/aZijgt8/builder_games_pc.pdfIn PDF document text
    • http://wozoxudo.iblogger.org/simaxakipalaxegifivisenib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500904/normal_60469e6640ccc.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/dOHFwhe/stick_ranger_2_hacked.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/mimepokor.pdfIn PDF document text
    • http://zaparipajomigi.scienceontheweb.net/ibps_notification_clerk_2020.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/2005_buick_lacrosse_cxs_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/jgfjigh/98492670943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_6036b035a9446.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/how_to_turn_off_demo_mode_on_panasonic_genius_microwave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/081c1016-16ac-4776-94da-77c1accfda8b/weber_e210_parts_list.pdfIn PDF document text
    • http://surenus.epizy.com/51473123795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b155b4e6-8834-4f82-b13e-5db6c2c3e719/bonolajolujopunanen.pdfIn PDF document text
    • http://nedudumitariz.epizy.com/aprender_a_leer_partituras_de_guitarra_acustica.pdfIn PDF document text
    • http://zegetafirotazaz.atwebpages.com/48702116169.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_off0000f8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 5464 bytes
SHA-256: 516d35280afca019694dd56d40b62de96c168682699e8a53b0836f2f24255769
font_01_sfnt_off00010b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B32 10508 bytes
SHA-256: 5492aca7bb9119858da23d098f92f47b166ee0fb6ca6b67c81ba2d506aa130b9

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