Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d0e637275c5e6d…

MALICIOUS

PDF

89.4 KB Created: 2021-04-04 00:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c42470a207e0531fcb654baf981881e9 SHA-1: 991cc445ccf5ec826af057a91e9b342d2efa22f6 SHA-256: d8d0e637275c5e6d1e96859903ea19ff95b32045e882a17f702ce15f023135ce
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/123?utm_term=platform+is+not+defined+python PDF link annotation
    • http://govazibibili.22web.org/3762667531.pdfIn PDF document text
    • http://luzupogakij.sportsontheweb.net/kisekiboninepinopawuwe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376856/normal_5fcbe32565959.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/xuniweradawoguwuluzoduk.pdfIn PDF document text
    • http://wudebakafepi.mypressonline.com/35614148188.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/how_to_do_airplay_on_roku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_602c617f8dd76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476275/normal_601742bd4e870.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387924/normal_60043e2e85312.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/6942709636.pdfIn PDF document text
    • http://gagogepatajebe.medianewsonline.com/99215980874.pdfIn PDF document text
    • http://serawuv.mygamesonline.org/obituary_samples.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temolujipu.myartsonline.com/price_of_siemens_plc_controller.pdfIn PDF document text
    • http://geboxopok.rf.gd/hebrew_alphabet_worksheets.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/sisedadilixuporusejuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b88bb0-79a6-4cc4-bb27-cd3de0ca626e/pugawuvi.pdfIn PDF document text
    • http://sivigowukom.epizy.com/splash_screen_example_in_androidhive.pdfIn PDF document text
    • http://pubejajefili.rf.gd/ryobi_cs26_price.pdfIn PDF document text
    • https://6db1e9a2-4282-4636-8d41-de07325ad911.filesusr.com/ugd/d97b38_bede19c5269b4b2d9024be464601c884.pdf?index=trueIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_3564fd1224a443f99ead8718c152c4a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/439ebc7a-dc6b-4634-a966-de9df6ed77c0/fedezasilor.pdfIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_ed00466470b244d6948ca11703748dd9.pdf?index=trueIn PDF document text
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_54726a3389264ee6ad45f4ddd38b9c42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb983975-9218-4d36-af01-bc8b854fcfd9/chick_fil_a_menu_nutrition_salads.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_off00011e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E07 5384 bytes
SHA-256: 5d32ed74278a0bd247f0a9a7ee3ddf5c913ffdd00bca4ff6181473080601268e
font_01_sfnt_off00013036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13036 11816 bytes
SHA-256: b6fa19f90649671b3db29be62ea6ade06436979c6d1610c128df1b9f7a228140