Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2aa80cf19eb188…

MALICIOUS

PDF

74.0 KB Created: 2021-03-23 10:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d6e9da21bd7abb9c98057a05eb2c3652 SHA-1: a8a4c19c7bcbde9b5485c26019f6cf1437c3259b SHA-256: 3f2aa80cf19eb188b79561026012106b0cb206f6c041e342e52d38eeff061504
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically highlights the nature of these links, indicating a potential attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/wix?keyword=the+world+on+the+turtle%2527s+back+audio PDF link annotation
    • http://spacexfoundation.net/how_much_does_a_teacher_in_arizona_make2f5im.pdfIn PDF document text
    • http://logusubunovad.22web.org/tebekipogadize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390383/normal_601e3e8c5394c.pdfIn PDF document text
    • http://bagawixaj.mywebcommunity.org/kixasedatufapewusip.pdfIn PDF document text
    • http://videohost.space/91450715797qxwpx.pdfIn PDF document text
    • http://rowifir.22web.org/advanced_microsoft_excel_courses_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408706/normal_5fcc91cd77820.pdfIn PDF document text
    • http://reduslim-italy.site/free_treasurers_report_template_for_nonprofit_organizationq59bi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_5fe814d0efb3e.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/49779240356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491670/normal_60465509f39d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wabelat.epizy.com/13736180914.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/76396720567.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/tcode_for_customer_aging_report_in_sap.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/guitar_chords_generator_software_free.pdfIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_78b6009dec764f679cf18ddc807bbfe5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/futesegewisoxuwusogosoz.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/new_cg_love_song_2019.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_c5605d5a3dde4d55b96df8ea03058985.pdf?index=trueIn PDF document text
    • http://duzatip.rf.gd/45399690653.pdfIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_f783adb3c95f4ff2a80ddd182a32db16.pdf?index=trueIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_ecb1339eb5134e198175e0ec23b569bb.pdf?index=trueIn PDF document text
    • http://kaloruligot.onlinewebshop.net/dosamesipisexo.pdfIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_ce6673d54a9449308e3dc0367a1409a3.pdf?index=trueIn 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_off0000e20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 5304 bytes
SHA-256: f67b074fdec36bdf24d7ad3da44bf3c3be106a5986ad871df35bcfada8376acf
font_01_sfnt_off0000f422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF422 11124 bytes
SHA-256: 265848267882ce515faaad2620b90364e614983e73be896eda11afdf10305883

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