Malicious PDF — malware analysis report

Static analysis result for SHA-256 502a5abcff406ac3…

MALICIOUS

PDF

81.0 KB Created: 2021-03-29 20:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f81d62a144eb46612f1b13bd36354aeb SHA-1: 5874823d62d034523846c1931402d4f6355298d2 SHA-256: 502a5abcff406ac3edeae09db13cb56437aca36ba58c26141bfc63cb7ad07b8d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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/award?keyword=advanced+vocabulary+in+context+pdf PDF link annotation
    • http://verification-help.business/fegisolozesaxakikurab3ndi.pdfIn PDF document text
    • http://rankingcoach-apps.com/90120780189485tl.pdfIn PDF document text
    • http://onlyforyou.space/toyota_camry_2018_le_specswj3xy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/welanisowari/15771397957.pdfIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_1e3b2c2f02384784ac7578bbf5e6b5fd.pdf?index=trueIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_36f4fd3bbbda469fb6b0f28d07c02d5e.pdf?index=trueIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_8ba9c8f610cb4ffea24be2615365a00d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88024300-10e6-4b10-b043-dd4a22e3ebe2/3d_gospel_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/net_operating_loss_carryover_worksheet_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/chaconne_sheet_music_yiruma.pdfIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_9a6153c07ded4b73b037e40d39a8df73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/free_3ds_games_onto_sd_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b528f77a-a9dc-4a31-86a8-cad1b10db323/do_foot_peels_get_rid_of_calluses.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/38561489674.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/fawetawijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3cd014-007b-4af2-bda8-cf3a68faa110/lokakejufik.pdfIn PDF document text
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_003fc3d7cd364d80a6f345a75bea983c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/bay_news_9_former_anchors.pdfIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_1c431ceb7e3142fa8fa8515dae227f47.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f12ef35-3b67-44d9-bc98-9939ff2d9059/lowopajosigabofazazaz.pdfIn PDF document text
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_3803e93bb5974646ab9a08a8484362ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b9512f-ba9b-4a8e-82c7-0219dbe773c5/metallica_nothing_else_matters_bass_lesson.pdfIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_f3d7c954566644dcbd4e21f268f22024.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_off0000feb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB7 5328 bytes
SHA-256: 8007ab548c989701c4115343ff69cc709ca139bddc90b3c8b93cd0101deb2d9f
font_01_sfnt_off000110f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F3 11116 bytes
SHA-256: 0d27a0d6b99996ff733509df0aa8bb56d2b5f08e74ac0d474b375e5d32891b43

Open this report in the interactive analyzer, or submit your own file for analysis.