Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc3736c93db470f…

MALICIOUS

PDF

81.2 KB Created: 2021-04-26 21:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 750a59c04c81a132d3d03ba7bb0b7a7a SHA-1: e9498cbbd2b1a2e2154e98ad4727db244b923370 SHA-256: 5cc3736c93db470f2924c3e13a3f81c5ae814aa00130df496e0f5b71db2ecdac
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains that appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a tactic to manipulate search engine results or drive traffic to potentially malicious sites. The primary URL identified, 'https://dugedepap.ru/strik?utm_term=como+fazer+uma+ficha+de+leitura+academica', is likely the intended destination for users seeking the document's purported content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://dugedepap.ru/strik?utm_term=como+fazer+uma+ficha+de+leitura+academica PDF link annotation
    • https://nobakavukip.weebly.com/uploads/1/3/4/3/134373074/jojeli_lawetadenumoji_resoterikatixo_ninalaninawo.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/dvrucjj/playstation_5_release_date_2020_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/duzokezubeka/jdLhjic/magic_rampage_bonus_level_2-_7.pdfIn PDF document text
    • http://thehensleys.org/268759516009gieq.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/rhinosinusitis_guidelines_idsa6euuu.pdfIn PDF document text
    • https://cdn.sqhk.co/regisanozoxo/d4jggdd/kisi_ek_reporters_lekhak_ka_naam_bataye.pdfIn PDF document text
    • https://cdn.sqhk.co/xudadidi/ejihggh/dekokutegari.pdfIn PDF document text
    • https://luwagibefex.weebly.com/uploads/1/3/5/9/135966535/luzifixejur_fitipafopu_nugamadefev_tetula.pdfIn PDF document text
    • https://mobinefoju.weebly.com/uploads/1/3/1/3/131398425/7181701.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/0cb12539-dfb5-4ea4-bce9-4975c2bd694e/gefuzorifebomomojati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8f4298-e088-48e6-a0ce-e5b899e43151/how_to_become_an_emergency_medicine_nurse_practitioner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90c9f4af-3db2-4656-91bd-48b1ba25caa0/the_full_dustin_and_suzie_neverending_story_scene_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/niv_bible_app_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/benetufada.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/91042189979.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/27197531462.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/how_to_get_out_of_the_habit_of_biting_nails.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc41d39-9573-48ac-a92d-c52d39cce783/why_is_my_motion_sensor_light_blinking_red.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_off0000f498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 5040 bytes
SHA-256: 3cf528659c00461b27a4284ad9f0ac2b1c26986f88d8615c5df6d560367a319f
font_01_sfnt_off0001058d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058D 1812 bytes
SHA-256: f3f8a10abf5ce55e477725b7f83a617fdf5f5ffbd32311c17dcdcbc4c3e9fe25
font_02_sfnt_off00010e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E69 12620 bytes
SHA-256: 0bf144f491625ee16fa907ae89b8b53f9b0d4bf8e1f9727e7b8a7a339aca084d

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