Malicious PDF — malware analysis report

Static analysis result for SHA-256 520d9df82c638bb1…

MALICIOUS

PDF

74.9 KB Created: 2021-03-04 14:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 80a3f9df1b06352fe86be6879465cfff SHA-1: 3da9c59344ec0a73a7ba5f0d1f72e65e5863b534 SHA-256: 520d9df82c638bb1f134cd41e3e60dab46f8f8225fc9c4597eff5e42421b4705
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://ponafet.ru/strik?utm_term=how+to+sharpen+a+mcculloch+chainsaw+chain PDF link annotation
    • http://photoforce.ru/plotting_line_graphs_ks2_ppta031h.pdfIn PDF document text
    • http://liruroz.iblogger.org/dragon_ball_super_manga_listado.pdfIn PDF document text
    • http://cetop.xyz/1998_suzuki_quadrunner_250_carburetor_adjustment9g1pj.pdfIn PDF document text
    • http://magnetfix.store/morezutevd0uc.pdfIn PDF document text
    • http://ylyn.ru/oppo_a33f_flash_toolbltyb.pdfIn PDF document text
    • http://mosdendy.store/823800182512bp1f.pdfIn PDF document text
    • http://maska-respirator.com/9809960704267xv3.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/16699afd-0720-49b2-b744-c096022308aa/legend_of_zelda_ocarina_of_time_links_age.pdfIn PDF document text
    • http://wubazinosimisod.rf.gd/clash_of_clans_bases.pdfIn PDF document text
    • http://tidefos.epizy.com/che_guevara_movie_in_tamil.pdfIn PDF document text
    • http://mapakifexi.rf.gd/14881828889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/661ed5e9-d1c2-4890-9bee-c03611e49ef4/31572419784.pdfIn PDF document text
    • http://xakitidopapav.epizy.com/burkert_fluid_control_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/how_to_reset_jetta_oil_change.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/lipififagifojum.pdfIn PDF document text
    • http://zuzojep.rf.gd/paper_chromatography_of_leaf_pigments_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/91329388504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1204069f-5f9b-4c9f-a56c-046bce5363a4/livadubipusew.pdfIn PDF document text
    • http://renubinivudeti.epizy.com/ts_16949_requirements.pdfIn PDF document text
    • http://jiresigotapikeb.rf.gd/49241186986.pdfIn PDF document text
    • http://kewivifonawati.epizy.com/88882489933.pdfIn PDF document text
    • http://zujewutaze.epizy.com/easy_calm_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfbfa9cc-54bc-4d66-b4bc-5d1ae1dd1142/rudufevalutulozivevip.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_off0000e822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE822 5224 bytes
SHA-256: 14013cd8082e88e03dc3d0745fde47e68ec3e2b377c9d963a2804399ff6ad83c
font_01_sfnt_off0000f9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CC 10564 bytes
SHA-256: 62d48a6e7d9ba89914b93db7895cf40703e5f8408567c6653cda6e865313f670

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