Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd727c394f48b29…

MALICIOUS

PDF

76.5 KB Created: 2021-04-07 18:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d2662f99d5a23ec8ea6f75d41211dff SHA-1: 967a08b419d34baa38347a9bcf48a5536c39b315 SHA-256: 6bd727c394f48b29ac2422c6c0620ec13352ee3982a14358cae408801c219a80
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malicious redirection attempt. The ML classifier strongly indicated maliciousness, and the presence of external URIs points towards an attempt to direct the user to a potentially harmful site. No scripts were extracted, but the overall structure and URL patterns are indicative of a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 4

  • 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://botokaw.ru/strik?utm_term=meeting+room+booking+software+free
    • https://pixogupegitof.weebly.com/uploads/1/3/4/5/134592450/d65ff168062afde.pdf
    • https://static.s123-cdn-static.com/uploads/4483624/normal_5ffecef9bf35f.pdf
    • https://pofimutazotoxo.weebly.com/uploads/1/3/4/0/134000188/8b0436e8.pdf
    • https://cdn-cms.f-static.net/uploads/4419191/normal_605a483c76678.pdf
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/1712284.pdf
    • http://netowamuj.iblogger.org/24468532665.pdf
    • https://danerukanem.weebly.com/uploads/1/3/1/3/131398025/1169603.pdf
    • https://fikamuvereza.weebly.com/uploads/1/3/4/7/134754658/dugalozasetofu_xizeguvugubop_pefatefewafix.pdf
    • https://rojobasexadef.weebly.com/uploads/1/3/2/7/132711954/duton-kebewosikaku-zabelobefule-vodapisez.pdf
    • https://kefubawivamati.weebly.com/uploads/1/3/5/3/135304753/8e89f4d2.pdf
    • https://static.s123-cdn-static.com/uploads/4366359/normal_5fcaf0c624d58.pdf
    • https://valiwuvubeke.weebly.com/uploads/1/3/4/6/134694219/67e2a2660220.pdf
    • https://cdn-cms.f-static.net/uploads/4380211/normal_602813861e24f.pdf
    • https://cdn-cms.f-static.net/uploads/4404292/normal_606716de9b791.pdf
    • https://rixonusoraj.weebly.com/uploads/1/3/0/7/130738646/givasawuwik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fa50ed81-c1ff-4ee5-8d3c-f1ec7c93f2fa/xejoxo.pdf
    • https://s3.amazonaws.com/tibitexil/sel_351_datasheet.pdf
    • https://uploads.strikinglycdn.com/files/9c96572d-740d-4549-a785-bd4743d0a3c8/alpine_ine-w960_installation_manual.pdf
    • https://s3.amazonaws.com/gogoxowiniza/how_long_to_cook_ground_beef_jerky_in_dehydrator.pdf
    • http://derugibuxopil.epizy.com/characteristics_of_good_programming_language.pdf
    • https://s3.amazonaws.com/zubuwujoxom/63955792649.pdf
    • http://pavapivujuv.rf.gd/magixuxuvos.pdf
    • https://s3.amazonaws.com/silubebebefuju/amman_god_songs_starmusiq.pdf
    • http://givorajosi.rf.gd/free_club_flyer_vector_templates.pdf
    • http://jaxojuru.rf.gd/que_tipos_de_obligaciones_hay_en_relacion_a_los_derechos_humanos.pdf
    • https://uploads.strikinglycdn.com/files/1e77ae4a-ebd7-4055-8f00-25002716af4d/86479525419.pdf
    • https://uploads.strikinglycdn.com/files/8de21a80-f2c5-4c4d-81ca-a3e3360a8a8a/adobe_premiere_pro_free_download_full_version_for_pc_2020_crack_getintopc.pdf
    • https://uploads.strikinglycdn.com/files/a55a729d-7f27-4bc7-a9a2-38c17cd27d1f/difference_between_aci_318-11_and_318-14.pdf
    • https://s3.amazonaws.com/dovulavavo/2006_dodge_stratus_sxt_specs.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec28.bin
9fbe5930d93c9d55d9743c1dbd3b023cd2a004a38a2710bcf1888ec1ae7c618f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC28 5356 bytes
font_01_sfnt_off0000fe70.bin
a7c7d2fdc15bf1c1b3658ebd986d0365709286337f849af0a4daeb255b82c4e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE70 11172 bytes

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