Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a9fe6fd9380ea3…

MALICIOUS

PDF

75.4 KB Created: 2021-06-03 04:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 94098c5cac8385891caccc24a35e122e SHA-1: 57b62e08dde879df5c252abc25d81050d8925992 SHA-256: a7a9fe6fd9380ea367a547e33a5b98e99a6e322424ecbb68dd8f917c56aacec7
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to 'piano sheet music', likely intended to trick users into visiting malicious or phishing websites hosted on domains such as philabc.ru and weebly.com.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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://philabc.ru/pbw?utm_term=isak+danielson+ending+piano+sheet+music PDF link annotation
    • https://mizemajawoxulu.weebly.com/uploads/1/3/1/4/131437858/3207760.pdfIn PDF document text
    • https://tudepaweper.weebly.com/uploads/1/3/4/6/134607512/roroxavonew_tizogipotulot_makozix_pekavovuwoxufax.pdfIn PDF document text
    • https://kigazapaxulet.weebly.com/uploads/1/3/0/7/130774964/xotesuzub-rawofuwojek-vajerufapif-mizovogeg.pdfIn PDF document text
    • https://wasefopepaseb.weebly.com/uploads/1/3/1/8/131856398/d428234a.pdfIn PDF document text
    • https://bokozadag.weebly.com/uploads/1/3/0/9/130969835/pemodufevovumi.pdfIn PDF document text
    • https://kunobutos.weebly.com/uploads/1/3/4/2/134234797/fubivi-fasuzaduwum.pdfIn PDF document text
    • https://buzapakamewogu.weebly.com/uploads/1/3/4/3/134366326/rononijozidetobosip.pdfIn PDF document text
    • https://xunilizavokuniz.weebly.com/uploads/1/3/6/0/136050149/roxen_bilutasomi_zurazop.pdfIn PDF document text
    • https://sefokuto.weebly.com/uploads/1/3/0/7/130738721/zelabufelukatut-fefuta-tugororidapuzum-larujidebo.pdfIn PDF document text
    • https://widedajixefur.weebly.com/uploads/1/3/5/3/135312737/3c11d.pdfIn PDF document text
    • https://sepafolelobonel.weebly.com/uploads/1/3/4/6/134614676/supikudawuvo_xekurusage_xulefab.pdfIn PDF document text
    • https://vowevabejera.weebly.com/uploads/1/3/0/7/130775986/luzikopotixaped-kamidijotosila.pdfIn PDF document text
    • https://kadekorik.weebly.com/uploads/1/3/1/4/131453454/masuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pakesobiroge.pbworks.com/w/file/fetch/144533892/how_many_questions_on_cdl_passenger_test.pdfIn PDF document text
    • http://rimikupababo.pbworks.com/w/file/fetch/144535089/varovavun.pdfIn PDF document text
    • http://veweran.pbworks.com/f/xerunofoxi.pdfIn PDF document text
    • http://zilebunod.pbworks.com/w/file/fetch/144426165/60502765618.pdfIn PDF document text
    • http://veniwusuj.pbworks.com/w/file/fetch/144492039/solving_rubiks_cube_3x3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ccd158-64d4-4a4e-a852-a2c4035eda7e/72273895119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc41b8b-72c0-4e4c-b375-a1163b246213/beats_studio_2_original_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f53f1f9-9ad7-49d4-979f-16b04185d6cc/tovapivuwuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fcfab37-769a-4551-8085-f0a1b499e8aa/59918608995.pdfIn PDF document text
    • http://mavujeridolu.pbworks.com/f/pubabofadetunofuwaxiwowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f05de87-74d3-4901-9654-daa78775782c/toxatezajozarukodosinogum.pdfIn PDF document text
    • http://zajozote.pbworks.com/f/dictado_acentuacion_sexto_primaria.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_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 5392 bytes
SHA-256: 47326e289914fab194953bdd866a48ebba0e4aeb3a0cdffe96303adb68e01235
font_01_sfnt_off0000fb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5F 10652 bytes
SHA-256: 564f8539597892a287d3b8dc7c0f311629e828c84c3ab29ed9a89ae194d5c0a2

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