Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20f8d3b8f443d57…

MALICIOUS

PDF

95.6 KB Created: 2021-03-24 17:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 740ba129fd1acfe5fc3e5b98c91d65ef SHA-1: 36b8cdbb6c399e6e34c7e5dd8a4e34042e6dae33 SHA-256: d20f8d3b8f443d57cf6cc8f63265f03b084e69c49a094702576ffebaa3add654
134 Risk Score

Malware Insights

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

The PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one on disposable hosting with UTM parameters, suggests a phishing or malware distribution attempt. The heuristic 'SE_INVOICE_LURE' further supports the idea that the document is designed to trick the user into clicking a link, likely disguised as a legitimate document like a software escrow agreement.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://golowaki.ru/123?utm_term=software+escrow+agreement+template PDF link annotation
    • https://xogudefimo.weebly.com/uploads/1/3/0/7/130775634/zugesipifuxuga_tumumup_tonukulogu_tusovajam.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/cyrano_de_bergerac_film_2020_cast.pdfIn PDF document text
    • https://kavikazu.weebly.com/uploads/1/3/5/3/135392310/6512053.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/86697643242.pdfIn PDF document text
    • https://xizirujikalowev.weebly.com/uploads/1/3/1/4/131454807/wusamerigosov.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/1VjahjX/my_tech_hub.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/grounding_techniques_for_ptsd_worksheet.pdfIn PDF document text
    • https://xazefobilizap.weebly.com/uploads/1/3/1/3/131384081/98206.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/KKqieq9/download_video_blackpink_ice_cream_zepetto.pdfIn PDF document text
    • http://zekifafeter.scienceontheweb.net/the_cavite_mutiny_toward_a_definitive_history.pdfIn PDF document text
    • https://cdn.sqhk.co/jupurutage/gehgvAn/abrahaminte_santhathikal_background_music_free.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/82079550133.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/gjhjgie/worst_game_on_steam_mr_beast.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/ctkihii/whistle_ringtone_for_android_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xojafimib/4jcptif/fakapisofixip.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
    • http://puzazodigeza.epizy.com/36542076237.pdfIn PDF document text
    • http://xurosuforudev.atwebpages.com/75934561061.pdfIn PDF document text
    • http://soxewimudinozuk.epizy.com/52600251977.pdfIn PDF document text
    • http://mipagolawalixa.onlinewebshop.net/zupovegafuror.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/wusakisowivujaw.pdfIn PDF document text
    • http://pilivizelonula.epizy.com/beerappa_oggu_katha_songs.pdfIn PDF document text
    • http://jorasixu.myartsonline.com/dangling_and_misplaced_modifiers_exercises_with_answers.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_off000128c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C7 5268 bytes
SHA-256: 05891aec6a66b41afd9d84d2dab68b304ed72f20d096d1accb709720647cd508
font_01_sfnt_off00013a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9D 11824 bytes
SHA-256: 2acb9030b70522d978c109ef74d5a202e77123548bb8d9f0ac3e7a5ea571b6f8
font_02_sfnt_off000162b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162B4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34