Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eec7da79d7c1b6d…

MALICIOUS

PDF

85.3 KB Created: 2021-04-05 19:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0446eecc15cb885bb6604e46b7374974 SHA-1: fb28ecd8ea588e78b9ba3ac3ddd4e38348d2b667 SHA-256: 8eec7da79d7c1b6d0b80fd7ca4ad4574793df62797cac51846cabdee4665e83d
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ClamAV detection (Pdf.Phishing.Trojan-d2568dad23a94d95) and an ML classifier. It contains a link farm with numerous external URLs, including one pointing to 'lozipotod.ru', suggesting a phishing or ad-fraud scheme. The document's content, presented as a budget worksheet, is a common lure for such attacks. No scripts were extracted, but the presence of multiple external links and the heuristic firings strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/123?utm_term=monthly+budget+worksheet+for+young+adults PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402936/normal_60208ac7a441e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456376/normal_6064b919a080a.pdfIn PDF document text
    • https://judupivaruva.weebly.com/uploads/1/3/0/7/130775992/zivuzumim-noremuxizimaze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369936/normal_5ff249b902cbd.pdfIn PDF document text
    • https://sesogipe.weebly.com/uploads/1/3/1/4/131438268/eda169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_60308ffb23970.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/aminofilina_forma_de_dilucion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_600b953e78a1a.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/af735372-61e6-4e83-bf1b-ce1468eb069e/74579840451.pdfIn PDF document text
    • http://momedeturus.epizy.com/apology_of_socrates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73baa2a4-8b28-4c2f-928f-6807765f1d63/how_to_change_a_whirlpool_stove_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6868f9f-115b-45b4-97b4-2fb97c3cc5ff/mezewupusuxafigavaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2568e3f-f2bf-4794-91b8-0db3d0d495dc/meet_william_shakespeare_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/59471533663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0fa64e4-5882-4fcd-a7d6-64bf9b4f378e/how_to_set_the_time_on_a_pioneer_premier_car_stereo.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/liftmaster_877max_remote_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2f5f60-09b8-4499-9623-8a0f03415b57/cuntos_musculos_tiene_el_cuerpo_humano.pdfIn PDF document text
    • http://pulijivugis.epizy.com/leworo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7899f49b-3076-4ee5-976b-9c8e8cea1535/xufonowusolibolafaleludu.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/how_to_run_repeated_measures_anova_in_jamovi.pdfIn PDF document text
    • http://begagebo.epizy.com/animal_welfare_act_of_1966.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_off000101cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CF 5408 bytes
SHA-256: d645233788041360bf46d4c7e120f1509f9f6bd3446ac6d77da85342d1865ba9
font_01_sfnt_off00011447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11447 11020 bytes
SHA-256: b2f36f9ce81bca09c9a7409e159566636249fbec1af72ff474c2cdb3aa9ff18e
font_02_sfnt_off000139ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139CE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333