Malicious PDF — malware analysis report

Static analysis result for SHA-256 14eb8f2000ba6937…

MALICIOUS

PDF

83.0 KB Created: 2021-06-06 10:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a802b3430065e0267a3663bb9d91c82e SHA-1: 5060e14b07f511d63eb87046024c9313faa1ce3f SHA-256: 14eb8f2000ba6937e14e64ce2162aa995cd0be3309b0650d8acc7611f12c1924
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://crophysi.ru/123?utm_term=bhakti+ringtone+audio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374196/normal_604eccaf93e5c.pdfIn PDF document text
    • https://galesarenad.weebly.com/uploads/1/3/4/3/134380117/597130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422638/normal_6050622955f6d.pdfIn PDF document text
    • https://baxovazexozubuv.weebly.com/uploads/1/3/4/3/134318553/xokewupu-lebonojusus-nujojusew-vuwofafa.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/a5c62c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500200/normal_60255df1743cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_604174590461c.pdfIn PDF document text
    • https://devonejejarib.weebly.com/uploads/1/3/4/6/134608322/9600741.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4476767/normal_60afec1a2899e.pdfIn PDF document text
    • https://xavixikani.weebly.com/uploads/1/3/4/5/134502132/ripagijinejaxisole.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://lijegazoz.pbworks.com/w/file/fetch/144416079/defobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f9281d-6f3c-4af6-a2ac-ffe2b3bad7ed/what_elements_on_the_periodic_table_are_inner_transition_metals.pdfIn PDF document text
    • http://sixuditar.pbworks.com/f/dark_they_were_and_golden_eyed_discussion_questions.pdfIn PDF document text
    • http://bepisoxu.pbworks.com/f/textnow_apk_old_version_4.42.0_download_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f81f7d8d-f0f0-404c-ada5-b4e3cf42d778/5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2af64809-883c-4e87-a83e-5202b2ee7d61/79532817254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d787d1-973f-4e55-bf94-b861f8224a92/47136662784.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144640122/que_es_el_sentido_de_la_vida_para_viktor_frankl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28394294-c9b4-4ac9-9bd8-6f205d6fa3a2/data_mining_concepts_and_techniques_2nd_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac5a4b75-d457-453a-b5c5-775ac8907af9/computer_vision_system_toolbox_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aae1afbd-0233-450f-8110-37fdac353d27/palatufubumivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c5bae52-67b2-4769-914e-e7d9057ac253/warhammer_fantasy_army_books_list.pdfIn PDF document text
    • http://garigor.pbworks.com/w/file/fetch/144424743/que_paso_ayer_4_pelcula_completa_en_espaol_latino_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15991316-0863-485f-8385-f486275f18c4/tunarasijejijamozij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9de1033-d650-47d9-9603-59574f6498e0/rimodosaje.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_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 4992 bytes
SHA-256: 9277c53f3260c0bf041107f54247739949f62d078f23d9169627967c1ef7c93f
font_01_sfnt_off0000fdb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB9 11080 bytes
SHA-256: d121bb06d7d1dad25385fafb58152887d30e48b240fcdef9d78b152d1228fd2b
font_02_sfnt_off00012361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12361 7948 bytes
SHA-256: 936c89847bf200a8a55373bea3d7b1c87fdc6195b5eeb5418e4b1ba832f8e018