Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d993ff96b8faf3…

MALICIOUS

PDF

84.2 KB Created: 2021-03-06 20:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5acdb8a2bbb52f95a5ba3d348be19dc7 SHA-1: 56f192cc4fbbe87fd64e72d591b145992308ec32 SHA-256: e8d993ff96b8faf39284605da4115502beed195dc1542ca21e456ede17cdb523
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or redirection mechanism to facilitate phishing. The PDF structure and embedded content are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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://gimoguvi.ru/wix?keyword=15-f272wm+ram+upgrade PDF link annotation
    • https://ronenajawewaxiw.weebly.com/uploads/1/3/4/5/134594127/1292096.pdfIn PDF document text
    • https://tivofexogi.weebly.com/uploads/1/3/1/3/131398075/4e9e6d8dfb3ee4b.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/mecanica_vectorial_para_ingenieros_estatica_10_edicion_beer_espaol.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/75750109563.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/kitike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_602526cc5dc4d.pdfIn PDF document text
    • https://bodovusinorone.weebly.com/uploads/1/3/5/3/135347185/3777322.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424349/normal_5ff5daea28c72.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/7_habitos_de_la_gente_altamente_efectiva_descargar_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474445/normal_60199faf4b796.pdfIn PDF document text
    • http://remoliwagofaju.mywebcommunity.org/lomawosutet.pdfIn PDF document text
    • http://nadipewin.mywebcommunity.org/how_many_carbs_are_in_a_small_wendys_nuggets.pdfIn PDF document text
    • https://xaxozugine.weebly.com/uploads/1/3/2/3/132303195/634f54.pdfIn PDF document text
    • https://rirenumu.weebly.com/uploads/1/3/4/8/134884077/mexososidafusosad.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/24626693095.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligujizulogi.atwebpages.com/hp_compaq_pro_6300_motherboard_upgrade.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/dictionary_translate_english_to_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/podoxubemanefamalejekup.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/15856441667.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/google_play_games_ios_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/16954633084.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_off00010dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAD 5568 bytes
SHA-256: 1e131d76eb667bfc918b69c757c68b3869c327fb90a053ce62b2cf858cd4553d
font_01_sfnt_off000120b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B2 10392 bytes
SHA-256: 95d50bcf7fdd4f5c1d82d7f4d8d8b46cdd5991e3dcc1b6a20f756b14e5b27a7f

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