Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e34f17e1f604637…

MALICIOUS

PDF

70.8 KB Created: 2021-04-04 06:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06091c7214d9a20f80049b92f23341fc SHA-1: 040df445662c4e4548ad3a5200445928131dd891 SHA-256: 7e34f17e1f604637cd94ab0be20fa7be18a0dc23217f921f3d10dc216998578d
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with a high ML classifier score and ClamAV detection indicating malicious intent. The document contains numerous external links, many pointing to disposable hosting services, suggesting a phishing or SEO spam campaign. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://cdn.sqhk.co/tibakekavero/Cjhgfie/5914622475.pdf In PDF document text
    • https://cdn.sqhk.co/xonipavu/icjfeig/hang_glider_accident_2020.pdfIn PDF document text
    • https://jinepesel.weebly.com/uploads/1/3/5/3/135346763/7747501.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/ijivvgi/screen_video_recorder_for_pc_download.pdfIn PDF document text
    • https://fomodaduvi.weebly.com/uploads/1/3/4/7/134700625/telimez.pdfIn PDF document text
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/5b2aaa61.pdfIn PDF document text
    • http://theplafond.xyz/7811308331zpy6n.pdfIn PDF document text
    • https://cdn.sqhk.co/nogupuzejewe/gfjWghL/accountability_and_responsibility_in_the_workplace.pdfIn PDF document text
    • https://baraxuworasexe.weebly.com/uploads/1/3/4/6/134633060/4a605ced61d.pdfIn PDF document text
    • http://marketes.pro/vosikobugewepazufubemagagnvjey.pdfIn PDF document text
    • http://design-kvartira.info/sibanatamodujuzlqet0.pdfIn PDF document text
    • https://tumuzisokume.weebly.com/uploads/1/3/5/3/135351536/2081874.pdfIn PDF document text
    • http://opensoda.pro/epson_wf-2630_printer_error_0x60a7xq4.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/iehftp6/xudipuwan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/B9wesDdUo4k/wb?keyword=d-link%20dcs-932l%20installPDF link annotation
    • https://s3.amazonaws.com/rurosaveruk/carte_du_ciel_gratuite_astronomie.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/marketing_tools_and_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/cfmoto_zforce_800_repair_manual.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_eeee7ff5bfb4422ea2ca5db1f59a7796.pdf?index=trueIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_53249d4f366f4c47af5e8e75d2ba249f.pdf?index=trueIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_b263a1d1abcd4a2e8dadeeb2760c4dd1.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_off0000d843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD843 5384 bytes
SHA-256: 06f6713d011bbdcaa31ab5917673513a655c9da585adb82453e28bd63f2d3149
font_01_sfnt_off0000eaa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA8 10404 bytes
SHA-256: 1dfab6aee79b679f5584332ea7630c635e968ec5c46531a4c4e0856ad3528653

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