Malicious PDF — malware analysis report

Static analysis result for SHA-256 457dc1995661c275…

MALICIOUS

PDF

78.1 KB Created: 2021-03-15 15:13:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 05a0fb32993aec04d672df61ac9acf13 SHA-1: 4545508d383fc674b57c786a797a864529488bc7 SHA-256: 457dc1995661c2753876075fe00e9519604ff300eac271bae215b12fc40d3956
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, with one prominent URL pointing to 'ponafet.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Chick fil a small mac and cheese nutrition facts', likely a lure to encourage clicks on the embedded malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/strik?utm_term=chick+fil+a+small+mac+and+cheese+nutrition+facts PDF link annotation
    • https://cdn.sqhk.co/denobafopum/hicbig1/uniquely_you_book.pdfIn PDF document text
    • http://justiciaforjustice.com/puzonovoti411e.pdfIn PDF document text
    • https://cdn.sqhk.co/morexemodoju/ieANQif/basic_spanish_workbook.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/jiNquhh/screen_stream_mirroring_pro_apk_2._7._1.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/your_lie_in_april_op_piano_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/dhgjd6I/snes_classic_walmart_brickseek.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/fBja1gh/hack_game_furies_last_escape.pdfIn PDF document text
    • http://nujatofu.22web.org/basic_hangul_alphabet.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/ifPrjcj/cpk_thin_crust_margherita_pizza_calories.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/wjhshiT/ruvisofuboginotuva.pdfIn PDF document text
    • http://onlinetiser.website/employee_training_and_development_7th_edition_chapter_3ytwx3.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/62837900-819b-488d-a201-581c5731f4ed/nujemitokisenorolipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb7b69a1-e94d-4db8-b05a-0f12bb620355/goat_simulator_payday_trophy_locations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/389724d6-aa7f-4df6-a993-4646bb539502/98234786750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884e526c-0572-41d3-ae7e-ea00d6eea9b0/who_are_the_best_suspense_authors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5b2e799-6581-4d9f-bbc5-49898f578508/79947095439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5927841-69b6-4da4-bf50-b811145e84ed/que_es_analisis_y_diseo_de_sistemas_informaticos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f8d0f93-b611-4ac4-9b42-b827211b2e66/what_are_the_different_types_of_integrated_circuits.pdfIn PDF document text
    • http://velirixegu.rf.gd/casamento_divrcio_e_novo_casamento_hernandes_dias_lopes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032804fa-74d7-4fed-9a60-4e181b1cdd94/manuxabejafetewovup.pdfIn PDF document text
    • http://xunawikavamenu.epizy.com/bucks_county_council_pension_opt_out_form.pdfIn PDF document text
    • http://poweradufuxi.epizy.com/fisitobemuzoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95929529-a23d-47aa-927e-bdb472eb80e2/91277953677.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_off0000f33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33A 5228 bytes
SHA-256: 04e0d904cbeffda1cd1d3a48181835bd705e084b0c411a9e221d173a7c4b008b
font_01_sfnt_off000104d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D7 11464 bytes
SHA-256: 210f0b2dcd17f1457a29c31cb2eee610488125f3de593525d95d0509d810706f