Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0eb616d6ec79fc0…

MALICIOUS

PDF

81.5 KB Created: 2021-03-16 03:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0cb7406359fb7b9f54a7c8b076a4c6e2 SHA-1: 2c4eebfca86b89e56e2c3c9d4daa5f5cd9afa930 SHA-256: e0eb616d6ec79fc0582147271d2c304712dfb0408f786e34755b8dbb59ce0e1c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://golowaki.ru/wix?keyword=magic+chef+countertop+ice+maker+troubleshooting PDF link annotation
    • https://mutixuvuv.weebly.com/uploads/1/3/4/6/134665255/danifode.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/uicjgBA/basketball_free_throw_distance_australia.pdfIn PDF document text
    • https://nukanepinax.weebly.com/uploads/1/3/1/4/131454046/0272f0da5228.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/d1PghaN/rewards_program_apple.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/how_to_prepare_for_questions_in_an_interview.pdfIn PDF document text
    • https://vuwapelenepaje.weebly.com/uploads/1/3/4/7/134705438/2866285.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/lord_of_the_rings_trilogy_extended_edition_blu_ray_review.pdfIn PDF document text
    • http://muwiduvepobuz.mygamesonline.org/14075296530.pdfIn PDF document text
    • https://cdn.sqhk.co/zufutetuwume/gjiiagd/wedding_invite_templates_free_word.pdfIn PDF document text
    • https://cdn.sqhk.co/wumidimux/lgh5agg/heroes_evolved_mobile_news.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/kiteb_danopu_fuxipomogerisi.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/69928200958.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/9ad7e21d-295b-497a-87a6-4bc071a1f505/critical_hit_generator_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/35543592175.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/vekonobipumifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8935ae73-46f5-4400-b960-ace5a458765c/interior_designing_courses_in_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d638ad-fbdf-41d4-90c0-7333f20232a7/14507374676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75117f80-bc71-4a57-b698-52be2643e09a/what_does_dissemination_in_time_and_space_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2400f66-1441-467c-8a60-21b526bad357/simple_pencil_drawing_pictures_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2caf1161-aee2-4bc2-87e4-507e19c480db/tesla_model_3_new_battery_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ae3510-448e-43ce-a76b-c8fecb41d8f9/jisibalamavijiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791d6b1e-f47e-45ef-9e49-a63b879e9fd8/39032979629.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/vupuj.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/15258375638.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41A 5520 bytes
SHA-256: 6f72ca7549ebd07e9b6e32f1c1fb0c7c1ab8d979ae94010c01a48d989eafddb6
font_01_sfnt_off000106aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AA 10300 bytes
SHA-256: ea61de5e291a17fbee56ca00d6c34a29cf7698f5859dad7f8e17da4d0e460d14
font_02_sfnt_off000129c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3