Malicious PDF — malware analysis report

Static analysis result for SHA-256 7819188e519d276a…

MALICIOUS

PDF

74.8 KB Created: 2021-03-18 06:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 67689eeec586c521b67ceeb51c8b4c3d SHA-1: 22d1d6f7eac511cb40c9917232198ee30f518c27 SHA-256: 7819188e519d276a4e937f336b55ebdc44aff3f281785d6ae2149b940035f2dd
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it's part of a link farm or SEO manipulation scheme, likely to direct users to phishing or malware sites. The presence of embedded URLs and the overall structure point towards a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://jacksth.ru/wix?keyword=yahoo+answers+dogs PDF link annotation
    • http://pasetbs.xyz/what_day_of_the_week_do_starbucks_employees_get_paidz829d.pdfIn PDF document text
    • http://cyberghost.store/asphalt_6_adrenaline_game_for_androidejm4g.pdfIn PDF document text
    • https://gajuleli.weebly.com/uploads/1/3/1/8/131871701/bulej_vofig_pamexixibuwez_makapekilesofe.pdfIn PDF document text
    • https://toxafowusolele.weebly.com/uploads/1/3/2/8/132815148/1073077.pdfIn PDF document text
    • http://lightly.store/how_to_unfreeze_ice_maker_water_linefotnz.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/4a26c99e-5ed1-4a03-bb38-919e825244ca/lajidajupuvebas.pdfIn PDF document text
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_d1b8f50b761e44da8ca31b44cbf377b7.pdf?index=trueIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_51a43bf658d84ab99098288c604cd99d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/48117373612.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_a1011d0053db42de9a38dd7540da930a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/how_to_delete_schedule_roomba_780.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/astral_chain_guide_file_07.pdfIn PDF document text
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_3e49032e37c342e0b83a5138d1e50799.pdf?index=trueIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_b7d896aab50041f080fe9a8577a29aff.pdf?index=trueIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_a3d4b35b834c414eaed114d5fe9ebbbc.pdf?index=trueIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_8e0f006dab444a80a7e025b2bf39e6ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a6b6a96-6d4f-4284-a7f1-f878202416ab/wogenukanufebinuxudezun.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/animal_crossing_pocket_camp_android_version.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/bofevodusawelozojavinut.pdfIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_d0804f97c9ae43629f9134d77c9f981d.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_off0000e7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EF 5108 bytes
SHA-256: 1c96f38d5b65f2715e20f590cef539524f0ca30ad289e39b47c5a606ec1e4f19
font_01_sfnt_off0000f959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF959 10844 bytes
SHA-256: c45e25b4f7d1fab6d82c11cf2d6750aba279f83417954aaf4e782e183584869d

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