Malicious PDF — malware analysis report

Static analysis result for SHA-256 b477e1732749d0a8…

MALICIOUS

PDF

76.2 KB Created: 2021-03-20 19:27:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b812140ee6db81b78d8bbd56069186b1 SHA-1: 30ca4a9d09d404ad32a70338504d986fa017dd59 SHA-256: b477e1732749d0a8505775aad489d3afc291259af1e68cf62c5746f1fc5eda55
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or redirection mechanism for malicious content. The document body, though heavily obfuscated, contains keywords like 'guide' and 'church hilliard' which could be part of a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/wix?keyword=guide+church+hilliard PDF link annotation
    • http://komarovskii.xyz/56254561479lzajj.pdfIn PDF document text
    • http://hellesypakk.online/2841167688jvfls.pdfIn PDF document text
    • http://masito.space/govefetezipifinaterekoniw4six0.pdfIn PDF document text
    • http://mufosubofamar.mywebcommunity.org/zenidafip.pdfIn PDF document text
    • http://lngcliente.com/how_to_fix_bluetooth_problemsenvuj.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/14649336726.pdfIn PDF document text
    • http://hookup756.fun/army_crew_served_weapons_qualification_tables2mohh.pdfIn PDF document text
    • http://prostotit.site/veruropifumunuteje0mfc.pdfIn PDF document text
    • http://jiwitoletazadag.iblogger.org/is_it_illegal_to_possess_lock_picking_tools.pdfIn PDF document text
    • http://ctyr.ru/abolishing_performance_appraisalsjjtw1.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/constitucion_politica_mexicana_de_1857.pdfIn PDF document text
    • http://tideboweped.medianewsonline.com/manifestasi_klinis_hepatoma.pdfIn PDF document text
    • http://mkuu.club/771015252g9bsu.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/30710600286.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/26075190256.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pofumitiko.epizy.com/georgia_travel_guide_coupons.pdfIn PDF document text
    • http://fedatowuka.epizy.com/texas_autentico_2_workbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/973314fd-64f6-47e1-bdcf-a53f96013062/what_disorder_did_split_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/097b8520-1f2c-48b7-a5a2-16b3562a5fec/plantronics_voyager_5200_uc_best_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a907398-216a-4a14-be02-d309b3ead62c/how_do_i_prepare_for_an_electrical_engineering_interview.pdfIn PDF document text
    • http://funadorexizuju.rf.gd/samsung_nx300_camera_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDE 4880 bytes
SHA-256: f9e13e927706c490d1fa0c9ae66c4b9a383658dba46143e823aec49784243da6
font_01_sfnt_off0000fe6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6D 11168 bytes
SHA-256: f1f4733336fe5abf9c6717d4477029eb0f090d4d448bd0fa13708c76423bec9c

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