Malicious PDF — malware analysis report

Static analysis result for SHA-256 902eb7d6469f4753…

MALICIOUS

PDF

74.8 KB Created: 2021-03-27 18:23:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a65d43ac2e31cf1400c9603b59c11f57 SHA-1: d711bb362fe638cb31c94a49120f0802b6b18efa SHA-256: 902eb7d6469f47538273d90a2372b80d4709835857a63c6efda277cca7306bd7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to disposable hosting services, suggesting a link farm or phishing operation. The primary URL, 'https://ponafet.ru/123?utm_term=bosch+logo+1800w+manual', is presented as a search result, likely to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://ponafet.ru/123?utm_term=bosch+logo+1800w+manual PDF link annotation
    • https://fivepixulata.weebly.com/uploads/1/3/4/7/134747110/jexipek_febojar.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/sezevuradaxiziwiwijobovi.pdfIn PDF document text
    • http://worajovijize.22web.org/abrsm_piano_scales_and_arpeggios.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/xonosodomijev_fesip.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/bf8e2e5bab194d4.pdfIn PDF document text
    • http://dewobazul.22web.org/centrosema_pascuorum.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/rudanunejonataj.pdfIn PDF document text
    • http://xugaguf.mypressonline.com/deuterocanonical_books.pdfIn PDF document text
    • http://mibemuxagegija.mywebcommunity.org/coronary_heart_disease_review.pdfIn PDF document text
    • https://nipixosawapur.weebly.com/uploads/1/3/1/1/131164079/birejiditeka.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/efd94173-e3d6-4fbd-935d-2f24e55259fe/1261040429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e9f2486-d051-4608-b1b6-4ed890f935af/dagavegowopuzogiliji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf37cb77-4bf1-490c-992d-025299f5feed/reddit_pokemon_go_promo_codes_december_2020.pdfIn PDF document text
    • http://pububaba.epizy.com/atkins_fisico_quimica_volume_2_download.pdfIn PDF document text
    • http://rixumigeva.epizy.com/bimixipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c540067-8c56-45f1-9b9d-08768888b9c3/samsung_galaxy_tab_2_7.0_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7f96c36-0757-4c8b-be2f-6dc440f0ecc0/98950877246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee6af4ee-0eb0-4735-84f0-97ca06555ae2/wordpress_login_case_sensitive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f56cb7c5-c3f6-41b7-b4b6-9d5d80f42deb/tidesarufudulurukil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6c186f-5435-40c0-a292-d5b3392d6bf3/renapakud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f9dd22-1003-4a9d-a5ee-98acc04e327c/lalirajurinavux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1427f914-70f5-4a4b-ae15-250e5210503f/kekepikoxifonol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba15410-63cc-43aa-bc5b-4417a3e265d3/focusrite_control_2.3.2_download_iso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5764a379-48f8-418e-afb7-c839550325fd/when_did_us_enter_ww2_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa387f00-25b3-41d8-a4ad-9f12c316d881/html_and_css_books_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6b98349-1164-417b-9e1f-22f0e4788788/how_to_get_va_medical_records_corrected.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/britax_marathon_clicktight_rear_facing_height_limit.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_off0000e545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE545 5644 bytes
SHA-256: 90bd058c6ce7319102e51464358fba7643e9cc6c68c190cd9d18d53134a5295c
font_01_sfnt_off0000f878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF878 10344 bytes
SHA-256: 7c0466f891ba2a1be329e92c843a01d7da1981b44d091acd958510e10e4e12c5