Malicious PDF — malware analysis report

Static analysis result for SHA-256 3077660e87fcbe58…

MALICIOUS

PDF

86.7 KB Created: 2021-03-19 20:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5a0af1c410ad5af016a1e76e8964ddae SHA-1: 1015409da88bdfc12561a9894f3760a83e5928ac SHA-256: 3077660e87fcbe58c5d3922f6d4db5bbeb5d05f69a16621b90db80ca0ea86fbb
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://nipisod.ru/wix?keyword=royal+envoy+2+level+51+expert PDF link annotation
    • http://wodekenizowa.getenjoyment.net/lord_of_the_flies_chapter_questions_7-9.pdfIn PDF document text
    • http://ladunalufim.iblogger.org/44887533266.pdfIn PDF document text
    • http://volomowoxe.22web.org/73239151055.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/askep_bendungan_asi.pdfIn PDF document text
    • http://kawasus.scienceontheweb.net/b._com_part_2_auditing_notes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dajovufozimok.epizy.com/dibels_oral_reading_fluency.pdfIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_5ffb69ee50d647ef9571e191b49b4c5e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/gethibernatetemplate_returns_null.pdfIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_2fa4c11f43ca40db9458a021efe6fa6f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zopenave/37983179585.pdfIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_275ce4eb4cc34d91be3b339a78991eb7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/update_bios_gigabyte_p61a-_d3.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/science_matter_word_search.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/fojixuwizab.pdfIn PDF document text
    • http://fatixoromagik.epizy.com/10875756026.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/wedding_march_piano.pdfIn PDF document text
    • http://zijijexumejege.rf.gd/personal_computer_world.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/pufemitowinaroxivarisobat.pdfIn PDF document text
    • http://dogolapobu.rf.gd/diwem.pdfIn PDF document text
    • http://nixawoxikoni.epizy.com/unicode_to_kruti_dev_offline_converter.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/ruteri.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/best_smoothie_recipe_book_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/gerhart_et_al_munson_fundamentals_of_fluid_mechanics._wiley_8th_edition.pdfIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_eac7a746df524c6db3de973492047b72.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_off0001185f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185F 5180 bytes
SHA-256: 29c29a79a5dad7a6ae4f1e6cd5b27a9dd79f434caa3a82e801bc5f3388e180e5
font_01_sfnt_off00012a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2F 10292 bytes
SHA-256: cd536b044d46d404f993b24aec27b553d390e1923f1b92c08ca02250a9daccc7

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