Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc37b633624964d…

MALICIOUS

PDF

80.9 KB Created: 2021-03-23 00:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c22f876b281d560b2fb67e79e752b7a4 SHA-1: 43b7f4f577452e74d68abf893dbdbab29079a7a4 SHA-256: 8fc37b633624964d79115cee7af4d0ba9954175d998369b257e1fad83631363e
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, with one specifically identified as a malicious link farm. The document body, though heavily obfuscated, suggests a lure related to "Dr Jekyll and Mr Hyde" to direct users to the malicious URL. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://xezojetit.ru/strik?utm_term=dr+jekyll+and+mr+hyde+chapter+7+and+8+summary PDF link annotation
    • http://vegofejolafud.mygamesonline.org/how_to_draw_for_beginners_step_by_step.pdfIn PDF document text
    • https://cdn.sqhk.co/wozovege/ig8wQgj/cloth_face_masks_washable_amazon.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/is_alcohol_acid_base_or_neutral1n2r8.pdfIn PDF document text
    • http://pravagims.net/xanometavokidegojapikodyug2l.pdfIn PDF document text
    • http://ejqy.com/android_review_notificationsuw6yu.pdfIn PDF document text
    • http://lessonsonline.site/is_booksmart_rated_r4jp0n.pdfIn PDF document text
    • http://russianpatentexpert.com/peace_like_a_river_chapter_17_summary77pe6.pdfIn PDF document text
    • http://dowotezovemalo.mygamesonline.org/anatomy_drawing_book_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/jbSgjib/8563766176.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_e6ebd9ded34b4f219da637567487db7f.pdf?index=trueIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_cd621f6f4fda43a5967a33d6f9315ad5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rowubunak/bloody_roar_ps1_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/fiveg.pdfIn PDF document text
    • https://83bd47e3-138d-48d8-8d00-514fe13b91b0.filesusr.com/ugd/c87a2f_da1620c0a9e54d71b9eb659d2e23710d.pdf?index=trueIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_5296249e4f66460c96de0093fe21ac92.pdf?index=trueIn PDF document text
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_b55076bcff1948859629b086d0c6c329.pdf?index=trueIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_6ad51ea76a334c8da939321f5bd3cbd1.pdf?index=trueIn PDF document text
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_e7f2d685f1fd489b9f5f7dbe74c60d4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonima/zifemudizemigevovuwifal.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_f2faecb01bce499fb2f2ee32787aa6ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/somamere/freeview_tv_guide_south_australia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 5552 bytes
SHA-256: dc65b74375eefd97ea1a6911c178b691a6d0acad0a29336bbbee89f98c6b10b8
font_01_sfnt_off0001022e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022E 10408 bytes
SHA-256: 2791c9333b9ed9e0ea6f922782c9d51751410246dfb40b346c8473201f2548ad
font_02_sfnt_off000125e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E7 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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