Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec023eeb8d4b79fe…

MALICIOUS

PDF

85.4 KB Created: 2021-06-04 22:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 26e92995f2eda9ea412682dad363c767 SHA-1: 532d1a7c265a17423ce3b200e6cf3b5f73740de0 SHA-256: ec023eeb8d4b79fe76ae8221ed74e21fb3ddbe075dd97f847817bdc07ec188a0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link farm with numerous external URLs, many of which are hosted on disposable domains or redirectors, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/123?utm_term=bhai+ravinder+singh+ji+albums PDF link annotation
    • https://tuxenovizomojow.weebly.com/uploads/1/3/7/5/137516496/b50ea489188a7f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_60551198f06eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470683/normal_601dd004785fe.pdfIn PDF document text
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/wamos-mapekererabeg-nujaguni-zejavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470401/normal_604b96eee5ce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470524/normal_5fd24b3214343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476150/normal_602640a485dc1.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://uploads.strikinglycdn.com/files/c0373659-0593-45f7-bf47-1b539a53c1d8/youtube_how_to_clean_filter_on_whirlpool_dishwasher.pdfIn PDF document text
    • http://genarozep.pbworks.com/w/file/fetch/144527571/sevopetonigugugatilag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e395688-b3e7-463f-83a7-0d3900485e02/que_se_necesita_para_ser_lideresa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82fb9a1-915a-4d59-bf22-9fbbd12a302a/asus_router_rt-n66u_password_reset.pdfIn PDF document text
    • http://mokapuv.pbworks.com/w/file/fetch/144612960/incomplete_dominance_codominance_multiple_alleles_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67b64215-b798-4f53-8f54-348b7e57b408/72719335140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4450d5c2-fa1d-477d-bb83-b23d6bcc5843/how_to_reset_genie_garage_door_opener_limit_switches.pdfIn PDF document text
    • http://tazijebep.pbworks.com/w/file/fetch/144427770/what_is_the_function_of_benthic_zone.pdfIn PDF document text
    • http://refarumiba.pbworks.com/f/how_to_get_cvv_code_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6caa2bd3-0aff-44e7-baff-9018b59f3052/watch_john_wick_3_sub_indo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3a9c00-9573-4c6e-ba1e-499bb6baf345/99295624828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70393ce2-174d-4b1c-afd5-e8c86c6093b7/65234908270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c36fbea-9a27-4ae0-b711-cec1bee38e1f/garmin_gpsmap_64s_sd_karte_einlegen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad64fc04-18bb-4d21-8c8e-dcfbe955ab01/dirt_devil_stick_vacuum_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001047a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 5256 bytes
SHA-256: cbf9763bcc2c853312765820608ea1c69d0c732caa210c38e3b3eb3c3bfafa95
font_01_sfnt_off00011627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11627 10604 bytes
SHA-256: 10904d8c4f3532fa10b71308f82a3dd130981206d456a56a28813c4071700501
font_02_sfnt_off00013a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A84 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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