Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d60ecd56bdb304b…

MALICIOUS

PDF

75.7 KB Created: 2021-03-25 07:24:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3dbda40b4ea2c660ca7c32c0c0713753 SHA-1: 2326362446c8ad0100192d033dfe4b1e0cb81b73 SHA-256: 6d60ecd56bdb304bc9479ee0bafc107a080b9f20ed510727e875e15d9096be57
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/award?keyword=simple+cricket+score+sheet+pdf PDF link annotation
    • https://powufekati.weebly.com/uploads/1/3/4/0/134012492/8716f547.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/navy_advancement_quotas_fall_2020.pdfIn PDF document text
    • http://zugamumenune.22web.org/kofobivoj.pdfIn PDF document text
    • https://vusubidasezojix.weebly.com/uploads/1/3/5/3/135399418/xemigelidipopatetiko.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/the_miracle_morning_book_list.pdfIn PDF document text
    • https://meremunodimabak.weebly.com/uploads/1/3/4/5/134516451/6076660.pdfIn PDF document text
    • https://lukogazusewof.weebly.com/uploads/1/3/4/6/134643336/nobosuzi.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/34451770894.pdfIn PDF document text
    • http://xukosususif.medianewsonline.com/essay_examples_for_6th_grade.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/1275819.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vikoxip.rf.gd/adsl_modem_alfex_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d933a1-e5d7-4b49-bbf7-eca990cd3220/suxizipemobuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d0702d-d0cf-4dc1-86c7-24c56af799c1/34039556125.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_a5bf845536234cb3b4599d3753015f80.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc15c1e-c092-4a1d-999a-bd903bc8fb09/kebewafipokoxebofel.pdfIn PDF document text
    • http://sudatidi.epizy.com/the_shining_remake_2015.pdfIn PDF document text
    • http://xofukadebinomo.epizy.com/51796635878.pdfIn PDF document text
    • http://todojenosefotaz.epizy.com/fatca_reporting_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e6cb7e-8341-4fd3-804a-0f0ad603e892/fuzofelefexuw.pdfIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_7fae324ed1284b3682afff9fdf0e025a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/275b545a-70b1-4744-97da-a5bffafbfc16/minn_kota_power_drive_v2_remote_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/seating_arrangement_questions_and_answers_indiabix.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/how_to_use_pampered_chef_ice_shaver.pdfIn PDF document text
    • https://a6047d18-b57f-4fdc-88fa-dea7715a8642.filesusr.com/ugd/189347_7ce83761200d4c0fbcdea05cae9bbe67.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_off0000ebd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD5 5352 bytes
SHA-256: a3c39ea6985916ad936dffe4a98c4ef5b00ac78572e6b3444492743c6ce8df97
font_01_sfnt_off0000fde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE3 10360 bytes
SHA-256: 3bd81b30e60a82a3ec5bf8880b3df60a95bdf39984377baf322af1339aad0f71