Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d7c0cc29b50ae6…

MALICIOUS

PDF

74.4 KB Created: 2021-05-15 10:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0aeb99061335d187eed0531b58fc4d54 SHA-1: 48ef014ca50b9d740081de12b31935e667a2c446 SHA-256: a2d7c0cc29b50ae670bad877e828412d405cd3234c4f4dfe010c2f1882921795
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary malicious URL identified. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/strik?utm_term=batidora+kitchenaid+professional+600+manual
    • https://static.s123-cdn-static.com/uploads/4375209/normal_5fee18b0228b0.pdf
    • https://cdn-cms.f-static.net/uploads/4474471/normal_602ab0901e934.pdf
    • http://se-mrush.com/lenovo_thinkpad_t430_laptop_specsm8xwd.pdf
    • https://static.s123-cdn-static.com/uploads/4369651/normal_5ffbc44d874cf.pdf
    • https://static.s123-cdn-static.com/uploads/4369933/normal_6006c5a358e41.pdf
    • http://vikiwamatibude.22web.org/govuzuvoxemanafijegegilab.pdf
    • http://health2health.online/tegowonuppeezf.pdf
    • http://fekedusotuxena.iblogger.org/97280962991.pdf
    • https://cdn-cms.f-static.net/uploads/4500893/normal_5fdad21a685de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://valogaberel.rf.gd/35467513463.pdf
    • https://uploads.strikinglycdn.com/files/67d0a6dd-7b0b-404e-8549-e2d2d21fea40/chuck_palahniuk_best_books.pdf
    • https://s3.amazonaws.com/lekezaru/best_pharmacology_book_medical_school.pdf
    • http://kolifidolositaj.rf.gd/cambridge_igcse_computer_studies_revision_guide.pdf
    • https://uploads.strikinglycdn.com/files/dccde8d9-975c-41f6-a311-7d59915fcf9b/ms_project_2010_user_manual_free_download.pdf
    • http://robinovedibepo.epizy.com/zivupadusat.pdf
    • https://uploads.strikinglycdn.com/files/062de9f2-1a2f-4033-839b-3c24c45c13b4/netgear_wn_2000_rpt_firmware_update.pdf
    • http://lisokabosexipep.epizy.com/cheap_monday_australia_size_guide.pdf
    • http://dalefiza.rf.gd/abrasion_dental.pdf
    • https://s3.amazonaws.com/firigugixujotov/28942998261.pdf
    • http://fadajoja.epizy.com/mejor_libro_sobre_historia_de_las_religiones.pdf
    • https://uploads.strikinglycdn.com/files/81ae665d-94aa-4c1d-b52d-e7652d86d4fd/zefopozamodupupokufunajef.pdf
    • http://moretavumafoge.epizy.com/tom_daley_weight_training.pdf
    • https://s3.amazonaws.com/juzowilipi/zemojanupokasi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5a5.bin
6f75ca71c488081cd8f92dedbde6b5a69c452b98b7096d08b362f99b6dd84cbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A5 5688 bytes
font_01_sfnt_off0000e8c4.bin
62b70c9649263a73c5c350ed87fa4c7924846a46614afee79b2cb291e11bf1ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C4 10468 bytes
font_02_sfnt_off00010b6d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6D 4324 bytes

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