Malicious PDF — malware analysis report

Static analysis result for SHA-256 86501b96af3b9bf8…

MALICIOUS

PDF

76.6 KB Created: 2021-03-10 17:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 75f861afdaf150e8f556e761992d7c56 SHA-1: 4f7c187bc9910a05f32b58a605c37e3a28f8c176 SHA-256: 86501b96af3b9bf8bfc5835bff054c30a7d84ae7449497af51c7534dbc3c79bf
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL and the document body text, though partially corrupted, suggest a phishing or social engineering lure related to downloading an application. The presence of external URIs and link farms further supports this, indicating the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://vilenefex.ru/wix?keyword=download+playstation+app+apk+ios PDF link annotation
    • http://viniveba.mywebcommunity.org/is_26_old_for_a_horse.pdfIn PDF document text
    • http://tesocoin.online/relacion_de_orden_parcialt30sl.pdfIn PDF document text
    • http://dombitarf.ru/how_to_get_rid_of_poison_ivy_rash_quicklyk5t3a.pdfIn PDF document text
    • http://reawolt.online/saxon_math_course_3_cumulative_test_8aywqdc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7820540-63aa-416c-a1f5-f8cc49e62f22/zoweximoberojir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c012627c-ffb9-47fb-b9d9-4034800e299e/63792658697.pdfIn PDF document text
    • http://kipazafar.atwebpages.com/2011_dodge_avenger_express_headlights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/392a7f3c-d557-4151-9428-077365f88cd8/the_summer_is_gone_and_all_the_roses_falling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8ce2ed-dc05-4e35-a084-b3720dac3795/google_me_search_history_delete_kaise_kare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ee6c26-d334-4440-85cd-67ff1b4fba09/how_old_to_get_hired_at_chick-fil-a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b0d2a0-9941-4708-b8e4-093275ba1c11/86711826726.pdfIn PDF document text
    • http://motitagododef.epizy.com/namusozusapexesavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07d39c2d-be0a-475f-b3e2-3e5bde77825d/nozes.pdfIn PDF document text
    • http://pedamodaw.onlinewebshop.net/nodusas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/885e297a-07b7-42db-ba73-55f2c8506185/what_is_hard_return_and_soft_return.pdfIn PDF document text
    • http://jexoxitisujoj.rf.gd/24109220037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8e5a805-0aae-41f5-ae30-9363fc7a4a6b/46230173578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/febd53eb-c2bb-4182-9ee7-376bb4f4c80f/fenurukegov.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_off0000f050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF050 5116 bytes
SHA-256: e2a3b89bd7f7040c9f7775ed36770fc66fc3f9c3af11c1304d19bb2f9d1e8957
font_01_sfnt_off000101ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101ED 10312 bytes
SHA-256: 737e648cdb10239a3142e22162102c079300ae4fe7839411f87f9368a16b4499

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