Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1034e489ee73f99…

MALICIOUS

PDF

75.5 KB Created: 2021-03-09 18:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 705e7095d2645df03a1f51684a061492 SHA-1: 346a868d610d19f04686e5b2e86c96f9e5ea873b SHA-256: a1034e489ee73f99b825d65f6c144a3975b1a6f873afd529d391c772f73d2fa8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on a URL that appears to be part of a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, further supporting malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://bologen.ru/strik?utm_term=chapter+17+earth+science+geology+the+environment+and+the+universe+chapter+assessment+answers PDF link annotation
    • http://1offpark.xyz/cr_consumer_reports_phone_numbercpvig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485822/normal_5fce87b3e334b.pdfIn PDF document text
    • http://omoikiri.info/216861143977au5x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404964/normal_5ff20b21762d1.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/61557509656.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454825/normal_5fc94d567fb5a.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/evenflo_exersaucer_triple_fun_entertainer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389366/normal_60126c0b1014c.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/company_of_heroes_legacy_edition_reddit.pdfIn PDF document text
    • http://carbags.site/glacial_acetic_acid_solubility_in_chloroform060dk.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/913220db-7936-408d-9785-2c7e1745dd2b/indian_navy_b_tech_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b916a21-cce6-4541-9911-91ba1e2b6e08/manual_de_carreo_para_nios_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f7d2f6-84c1-463c-a6bf-26e3c2a66aa2/much_ado_about_nothing_analysis_act_1_scene_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428a5fcb-a307-4e99-8388-b7cff43f6c85/big_little_lies_soundtrack_season_2_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e491fb4c-b660-491f-b8a9-5518014910ce/siditijanixilatudimeke.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/how_do_i_fix_the_flashing_screen_on_my_lg_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c518fbe-45a6-4776-936b-757c74470998/adobe_photoshop_cs5_crack_free_download_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce66314-84bd-4742-bc92-712b6b1df9dc/automation_production_systems_and_computer-integrated_manufacturing_4th_edition_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7cbc73-37c7-45df-bbc7-c120f8cef21e/wemuveririvamufeminufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49593e5-fe21-456d-909b-089c2fb0a480/olentangy_local_schools_spring_break_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bab83676-bf33-4a68-afef-59077eea9c8b/debolojorezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb390b7-c63b-49cd-bf9f-b636e8da4fdd/ultimate_christmas_fake_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b52f78-b085-4582-a2ef-7496cf143933/wusigasamonegejemanaf.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000d555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD555 6744 bytes
SHA-256: ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
font_01_sfnt_off0000e63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63D 5780 bytes
SHA-256: e236318f624cf1eaa46c55ef08ee5a268469a56c32c198c7d0f4dda7ae13127c
font_02_sfnt_off0000f9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 10276 bytes
SHA-256: 33f828ef547af6cc46c64aa8512a2b27c1a86291fd1c56ff69feb56104400224