Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e995d21cd1d73f…

MALICIOUS

PDF

84.6 KB Created: 2021-05-06 10:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6d11ce60422014755cfd68f2193fcbf6 SHA-1: 261c54b2ee362e7bab0e730aa7e657fcb8a23fa6 SHA-256: 95e995d21cd1d73f2dfe08259f76cc355bfdb59ad4d143c91e65a20a2f695663
186 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. It contains numerous external links, with many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://maypoin.ru/strik?utm_term=elements+of+design+shape+and+form PDF link annotation
    • https://gofuzuxelizexo.weebly.com/uploads/1/3/5/3/135391542/joginoxivosib_bujomixejekokiz_dutovaf_gogusulimazak.pdfIn PDF document text
    • https://tumebadov.weebly.com/uploads/1/3/4/8/134863232/wetimipaxizun-sotusokobumu.pdfIn PDF document text
    • https://banodita.weebly.com/uploads/1/3/4/3/134311275/dufomonubi.pdfIn PDF document text
    • http://jipegogujozu.22web.org/luxaj.pdfIn PDF document text
    • https://didokizobu.weebly.com/uploads/1/3/4/7/134711826/4359054.pdfIn PDF document text
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/tapareke_rutuk.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://e53c8fcc-339b-4d8f-83f6-44ddc8c6ace4.filesusr.com/ugd/1ea9c4_25252b07395640258ead1970c4d44c16.pdf?index=trueIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_bb2802e733834b65956b0d58ed97ad59.pdf?index=trueIn PDF document text
    • https://484a0fbd-04e0-416f-b335-41eb3f66808b.filesusr.com/ugd/228afb_1d07ebf7609e4018b1512a53e534c979.pdf?index=trueIn PDF document text
    • http://gipanigiwulaj.epizy.com/20241983671.pdfIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_cbd531325c074ed28673673b718a9a5b.pdf?index=trueIn PDF document text
    • http://tuvojiteziw.epizy.com/vajenetuzakimode.pdfIn PDF document text
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_bf3ac05b9b5045f6b366defd946e54ed.pdf?index=trueIn PDF document text
    • http://getomewemoxut.rf.gd/84092196495.pdfIn PDF document text
    • https://b73db3ac-2e3c-475a-83ab-7f4668f00a8f.filesusr.com/ugd/80e8fa_26b78df466f440268a2c26950bfe726e.pdf?index=trueIn PDF document text
    • http://kofikirigor.rf.gd/dux_britanniarum.pdfIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_8ee49fc00a884c55835dd97bee051de9.pdf?index=trueIn PDF document text
    • http://pamubaj.epizy.com/cajun_injector_electric_smoker_for_sale.pdfIn PDF document text
    • http://ninamivekadod.epizy.com/41918680981.pdfIn PDF document text
    • http://zusobasiluwu.rf.gd/39823884239.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_99990a336f49458ebd76acfa909c2bdb.pdf?index=trueIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_49b76fbd35254879876d3b5b28847930.pdf?index=trueIn PDF document text
    • http://tupopozavagaf.rf.gd/babbu_maan_new_video_song.pdfIn PDF document text
    • https://84bc2af4-305a-40b7-847c-8c52cb6b08d2.filesusr.com/ugd/a2e525_abe88146eb4744baaf4cb25af3c9081c.pdf?index=trueIn PDF document text
    • http://visowazugib.rf.gd/covid_test_jobs_birmingham.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_f0f60679c2b54725bfeea817c8d54f5f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10009 5200 bytes
SHA-256: 28c9d479cd55ad84993dd99ea36daeb83757d681379308720d028223bd949bd0
font_01_sfnt_off0001118c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118C 10892 bytes
SHA-256: 20f0eacb8a215539746054a2ad438e2a9d9ec2075bbb243a4bf2291534a2aca3
font_02_sfnt_off0001368c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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