Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e321bb98c77abf…

MALICIOUS

PDF

85.1 KB Created: 2021-03-14 16:31:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 72dc9daec497b719e8cc58d10cbdfdc8 SHA-1: 7b3fd32098f879cb74bdc150b5662b0f6c48bb15 SHA-256: c6e321bb98c77abf54a01e57316751846be7763ee37c97f7aa139f7d52292689
194 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting itself as a news paper to entice users to click on numerous external links, many of which are hosted on disposable domains. The primary goal appears to be directing users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/award?keyword=tamil+news+paper+today+daily+thanthi+epaper+pdf PDF link annotation
    • https://setuwome.weebly.com/uploads/1/3/0/8/130874340/3032169.pdfIn PDF document text
    • http://zoxuruje.sportsontheweb.net/when_is_diary_of_a_wimpy_kid_wrecking_ball_released.pdfIn PDF document text
    • https://rujusuxiledajo.weebly.com/uploads/1/3/4/8/134861970/gigabifalizim-muwurimowuzuko-jamuz.pdfIn PDF document text
    • http://pasiworuwiwoz.getenjoyment.net/mapa_bruselas_imprimir.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/2474400.pdfIn PDF document text
    • http://funomixukipiv.iblogger.org/rare_gene_mutation.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/147152bb-dd23-4abf-b701-b5caac7eebcf/are_tire_flips_a_good_workout.pdfIn PDF document text
    • http://puwawujabewup.rf.gd/asphalt_8_hack_no_survey.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_b43924ca4501468ebec686ef518e9ba9.pdf?index=trueIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_c76ebb794bfc4fcebfb349471bd591e1.pdf?index=trueIn PDF document text
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_9b739a05027a4f5eb1cc220f40e1f643.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/743f2226-c344-42fa-989f-2341b5cda983/33932001495.pdfIn PDF document text
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_084eeb9ddff242078d51c98f7a093c9a.pdf?index=trueIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_ddfbaa5101504cd8b9fa46e130bb7f68.pdf?index=trueIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_6fc92d2aca6942e1a10f2969ac43ce41.pdf?index=trueIn PDF document text
    • http://litosivofojolid.rf.gd/katibubal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0322585d-b509-4483-b8c6-727984e46c78/80839414517.pdfIn PDF document text
    • https://10bc5e17-7652-4c7e-9b43-999b3eb3b021.filesusr.com/ugd/5edc69_00c39da391d542dab5e47ca3c06f86c4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e6cc8d-3bec-4134-963e-f05ac856a4df/systemverilog_case_statement_string.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbcf44a6-ff9c-4e2a-a861-e9de81507679/casio_ctk-7000_specifications.pdfIn PDF document text
    • http://puligop.epizy.com/64938683824.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
stream_004_off0000f81f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF81F 17928 bytes
SHA-256: a718606f7864144af2d09fc662a170475818d9fadb37a50438ceca6963ec579a
font_00_sfnt_off0000e5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C3 5424 bytes
SHA-256: e6047f0250422bc8669aa61ad36a20f6646feb9019599763cb7aaba6792b9c61
font_02_sfnt_off0001214d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214D 10664 bytes
SHA-256: f237e748c9c81da3b238bdab0a94579fc80e8b4ce697d062d93f4f0a555047e5

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