Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ccf11753c168843…

MALICIOUS

PDF

83.2 KB Created: 2021-05-11 06:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e1908acf1cf974acd96ddf44fbb5b336 SHA-1: e564ba0ff3d3cd22a81de5aec5a79b23919554a9 SHA-256: 1ccf11753c168843319f8148e096b325317e66e970ba647b56d436370ec08bc1
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm used for phishing or distributing further malware. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/strik?utm_term=how+to+program+cuisinart+coffee+maker+dcc+1200 PDF link annotation
    • http://vupuvutepuvebow.iblogger.org/my_hp_photosmart_d110_wont_print_wirelessly.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/d8692d.pdfIn PDF document text
    • http://xokesate.22web.org/44400238827.pdfIn PDF document text
    • https://jenazikefu.weebly.com/uploads/1/3/4/0/134017187/899c6.pdfIn PDF document text
    • https://vifatogiso.weebly.com/uploads/1/3/4/3/134316440/jitevogi.pdfIn PDF document text
    • https://jafovoguna.weebly.com/uploads/1/3/4/0/134096268/caabeae.pdfIn PDF document text
    • https://kuvukodu.weebly.com/uploads/1/3/1/4/131453249/8676599.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/kujivowowevitekafe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_17b1fe37d9884af5a810cf0e6c410428.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/834b09a9-f599-490f-a444-81a0f5d6f5d8/how_to_disassemble_dyson_dc59_motorhead.pdfIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_475ad35d5b00420486f2c79dfd87bdc9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/99402e7f-aa11-4663-8207-09041cc8ec61/what_does_bq_mean_in_texting.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_a4d197a0c2df434ea3e0cda229445b56.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4302c1e1-a876-4492-a4b1-853c14d91a04/what_is_adaptive_behaviour_assessment.pdfIn PDF document text
    • http://tasoged.epizy.com/jesus_was_an_only_son_bruce_springsteen_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d6c157-9e9f-4b07-af38-11197192ef66/inside_the_criminal_mind_book_amazon.pdfIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_a7d2d903a6794a60bbec92d529268eaf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28037781-6e1b-41ef-862c-e4e02d310769/how_to_change_a_snowblower_auger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2fe80d5-5a9f-474c-b0a1-a7325e6a6b63/how_to_write_a_linear_equation_in_slope_intercept_form_calculator.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_0b3c9c8ee382422b8ec3e36d7ebd7dd6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab6ecb55-f59e-4060-b468-f1001b68ec9b/4679038004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01755fae-c73b-4a9a-a362-13d6987fbf0a/best_animation_software_for_ipad_free.pdfIn PDF document text
    • http://gazezubutajon.rf.gd/bradford_white_warranty_allowance_form.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F4 5888 bytes
SHA-256: 789ef456658160538d8ca7ab6813cef6f89a1e5f993dbf38acbb4a70b80d9a2a
font_01_sfnt_off00010504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10504 10908 bytes
SHA-256: 2edbf448fc2f75797d759794cbceaca2ab8a8441fab4fce3ca136fdde6397d1c
font_02_sfnt_off00012a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1F 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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