Malicious PDF — malware analysis report

Static analysis result for SHA-256 6319457eda631139…

MALICIOUS

PDF

93.8 KB Created: 2021-03-25 03:02:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bed2ff7454f2a97e07bc7b45c7a7877b SHA-1: a69eba7d2d3e7540618cfae96d50cb8960dbe859 SHA-256: 6319457eda6311391f304fe2e82a7acc8e1d167240f04c7bab47f537e5349785
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Eclipse ide for windows', suggesting a phishing or malware distribution attempt. The presence of numerous links on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=eclipse+ide++for+windows In PDF document text
    • http://storeeuro.info/el_principio_del_placer_jose_emilio_pacheco5dw32.pdfIn PDF document text
    • https://wobereresexo.weebly.com/uploads/1/3/1/6/131606335/4454884.pdfIn PDF document text
    • http://freud.icu/borges_and_i_meaning56ojl.pdfIn PDF document text
    • http://zespodsvetkoy.site/12895014058rtaeq.pdfIn PDF document text
    • http://uuuuull.space/digi_002_rack_drivers_windows_82e9dd.pdfIn PDF document text
    • http://trastenmyqort.online/bspwm_rice_guide1pzj7.pdfIn PDF document text
    • http://item-get.top/cortisone_shot_acnerrs7o.pdfIn PDF document text
    • http://prosale.company/how_to_draw_out_body_acne_from_workinglhlpw.pdfIn PDF document text
    • http://good-production20.site/how_many_words_should_a_20_month_old_knowqu0yk.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/3170305.pdfIn PDF document text
    • http://skidki-day.store/sony_alpha_a77ii_dslr_review22v8i.pdfIn PDF document text
    • http://talinab.iblogger.org/biwafug.pdfIn PDF document text
    • http://xonajagavasuj.22web.org/engineering_drawing_2.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/7c8cd3e7-15c6-4e43-b30a-63324fef8927/mlk_letter_from_birmingham_jail_essay.pdfIn PDF document text
    • http://gijuvaginitawaz.epizy.com/critical_literary_theory.pdfIn PDF document text
    • http://nipugizanevowo.rf.gd/vezawigirumawerol.pdfIn PDF document text
    • http://tewapodu.rf.gd/35124948113.pdfIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_f8129abecea84c079de536493b710b42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/386cb433-523a-4313-b814-2e1519c07791/kumifanidode.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_a800981463444e789dbdfc06c3cff39f.pdf?index=trueIn PDF document text
    • https://e49cd12a-7e53-4a25-9f98-ae37b5ff2e44.filesusr.com/ugd/35dc59_a896694ed44c4dc79041633f60c29983.pdf?index=trueIn PDF document text
    • https://2b075577-062e-477b-ba44-a680027dca12.filesusr.com/ugd/ee943f_cb2dc626b24448d18638217c5fd2e361.pdf?index=trueIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_265cf235bdcf44a3af066d329189cec7.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C87 4696 bytes
SHA-256: f132dda25e6e17fd907f5e63e615fded16ebf7bafa4a95423219a5185347ca31
font_01_sfnt_off00011c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8D 12120 bytes
SHA-256: c02361a9cc709ba082a03f052681c5647298922b4fc4f15435ee08c62700d8b9
font_02_sfnt_off0001463f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1463F 16128 bytes
SHA-256: 9ab047a044bec12c9f69351181402266ff25992488204655fc7e1071e619cd3b
font_03_sfnt_off00015b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B34 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3