Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc5d122289e646e6…

MALICIOUS

PDF

98.6 KB Created: 2021-04-12 14:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 35c3558ac7fefb5f426bb80d3e23d476 SHA-1: 735dab3b5b690382874036ae818793a6ff9bfa38 SHA-256: dc5d122289e646e6f30cef7b4672e3aee1cbe0bf701543ab1a1486d4ed556991
134 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains an embedded URL that redirects to a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of an external URI and the 'ML_NYX_PDF_MALICIOUS' heuristic strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://fokemale.ru/strik?utm_term=cub+cadet+ltx+1045+transmission+problems PDF link annotation
    • https://cdn.sqhk.co/tutabalero/dSrhcRK/3359972437.pdfIn PDF document text
    • http://opendouche.xyz/ingenuity_rocking_seat_cuddle_lambq1j7v.pdfIn PDF document text
    • http://xubajur.mygamesonline.org/what_is_a_boundary_line_in_math.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/z0LSria/57811159485.pdfIn PDF document text
    • https://cdn.sqhk.co/negapevu/bidjiT6/gagotazof.pdfIn PDF document text
    • http://artdebug.site/jefimesujemerupikameniwo12peb.pdfIn PDF document text
    • http://fobexugelego.getenjoyment.net/69250759223.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/hhehfic/translate_english_to_japanese_kanji_names.pdfIn PDF document text
    • http://akvatehnika74.ru/woodwork_for_inventor_2019_crack3hrhe.pdfIn PDF document text
    • http://lifeit.pro/97084704103wxl1y.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/servidor_web_apache_linux.pdfIn 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/76d201ee-0688-4e35-96a2-756f6476f45d/dell_latitude_d820_vga_drivers_for_windows_7.pdfIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_b6bb5b4ed15248829f74f62c5416d062.pdf?index=trueIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_497b64e751cd4fdeb156184a2d739b9c.pdf?index=trueIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_8cdedcdc573844288a247dd883b36c2c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d674371-1eea-4f18-897f-478a046a3fb9/91967228395.pdfIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_da44af13db2f4f088fa907e1483cb5ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/xetekabotizijomeso.pdfIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_1d62615dfb0942cb83640f500755a26a.pdf?index=trueIn PDF document text
    • http://litabasiker.onlinewebshop.net/buzomexokoxebokiwokudil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d30656ae-f2c2-4421-a0e6-730c6846800d/what_are_the_mudras_in_yoga.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/ccna_routing_and_switching_200_125_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/victorville_case_information_online.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_off00014222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14222 5736 bytes
SHA-256: 079bb39ab35584bf718b9097ad6d8cb81265304d450fb12007f662f6c85beca2
font_01_sfnt_off00015593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15593 11564 bytes
SHA-256: 46bfb03c96f7cc1ad0a5d3bc6595439c10704e2392db505deea7afeb9d310367