Malicious PDF — malware analysis report

Static analysis result for SHA-256 393d27d5bf0556ab…

MALICIOUS

PDF

90.1 KB Created: 2021-03-13 12:56:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1bf550093fb53057713c4e513484033e SHA-1: 5517a617f3a4c7f088a5d9f270c904b502cfa09b SHA-256: 393d27d5bf0556ab7fde4cd8e6769efcf4c4ff1c6cf89cdd3a543e02275dbd58
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://baarspo.ru/wix?keyword=pixel+gun+apk PDF link annotation
    • https://kezofufilulo.weebly.com/uploads/1/3/4/4/134488682/72ecd8b35a9c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485693/normal_5fddf78b8cf80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410002/normal_600e48c8e1833.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/word_2016_keyboard_shortcuts_not_working.pdfIn PDF document text
    • https://tukobigerokigab.weebly.com/uploads/1/3/4/6/134653943/gowanefof.pdfIn PDF document text
    • https://wesarifalonaba.weebly.com/uploads/1/3/5/9/135961423/nirokifurubobokesere.pdfIn PDF document text
    • http://fojefojegut.medianewsonline.com/tufevidiwiboxapezoxonuga.pdfIn PDF document text
    • https://wixokaregojes.weebly.com/uploads/1/3/2/6/132681478/kenus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414360/normal_60068da938cf0.pdfIn PDF document text
    • https://gixisinada.weebly.com/uploads/1/3/0/8/130814349/dezowidixipeturiliw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448720/normal_601bf956f3565.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://verovaweroxuxu.epizy.com/radaxisolarufeguzezuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ca9f2f-fcd5-442d-b435-4ca8857f88f5/kane_chronicles_netflix_movie.pdfIn PDF document text
    • http://zuputes.atwebpages.com/el_manual_de_supervivencia_escolar_de_ned.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/benefits_of_meditation_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/ronawanijenedimigij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a6f781-f750-4be4-87f5-f664b0d9e57d/comentario_biblico_adventista_isaias_66.pdfIn PDF document text
    • http://gebefamudusefo.epizy.com/the_anatomy_coloring_book_kapit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a1b38e-27b4-4c23-a197-a57da248e1ed/56910277897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ae7ab8-1d47-44ad-a71c-70ae8a6a9bfc/95742397040.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/altered_carbon_book_collection.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/numezer.pdfIn PDF document text
    • http://kamigawox.atwebpages.com/weight_loss_chart_app_free.pdfIn PDF document text
    • http://bubojawafutak.rf.gd/universidad_tolima_sibate_carreras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6778d6ff-2cc3-4fcb-bfea-b6a25b3ccb48/66487891868.pdfIn PDF document text
    • http://gizogebinide.rf.gd/cabal_mobile_apk_english_release_date.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_off0000da2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2C 23728 bytes
SHA-256: 405ab39dfcdf6eac89fd7806ad3460a27c527528156f618adc4eeb18579c973e
font_01_sfnt_off00012491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12491 4848 bytes
SHA-256: f26b7383c5b7c4fb4f7a3e738475cf8eb37307e8b394359f5c529536710bd931
font_02_sfnt_off00013532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13532 10184 bytes
SHA-256: 51d77c427c27509e872291f94d50aca82827763037f5e207645461b85599b688