Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ecb266d86f8891…

MALICIOUS

PDF

78.6 KB Created: 2021-05-07 00:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3a25702f49e08502eff527ce9071996e SHA-1: 2f5c30f96366fad3791bc4914edd904440413229 SHA-256: b2ecb266d86f88916eddc716c1dcad044f94e7cebc602dad3a3cc1205ddef5c9
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-optimized to appear as search results. The primary malicious URL, 'https://maypoin.ru/strik', is likely intended to host a malicious payload or phishing content. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://maypoin.ru/strik?utm_term=how+do+you+change+the+date+and+time+on+a+nortel+networks+phone PDF link annotation
    • https://namoxatiki.weebly.com/uploads/1/3/4/4/134477177/b70b26416.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/vumunadubogudav-besumiliz-degogu-kanusuxotu.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/448cd7b.pdfIn PDF document text
    • https://napifilimikap.weebly.com/uploads/1/3/1/6/131606974/tejotijute.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_4a593e10a199428bafd01d722c8484e4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7c0a13-6f4b-4a16-98c3-93bf3909ff3d/batman_a_death_in_the_family_full_movie_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/tell_me_about_yourself_example_interview_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/alistar_guide_s8_support.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791004c5-97df-44e1-8ff2-21cea502c083/meyer_e47_pump_oil_fill.pdfIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_e514c69ed85a451084ecf227511e934f.pdf?index=trueIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_cb2db091a2fc4435bfae61fbccc062e5.pdf?index=trueIn PDF document text
    • https://63d876aa-455f-4c41-9c38-50747f3e0b95.filesusr.com/ugd/a220d5_3c0224ff75bf40a09328e1487d99779a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sikuva/negenajisozij.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/whatsapp_werkt_niet_met_android_auto.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/71841440076.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/in_the_mood_glenn_miller_saxophone_sheet_music.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_38f8e4b9a5ce40ab9ca9ea1f907ffc5d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/dyson_dc59_motorhead_disassembly.pdfIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_5a878505043a4922a71b453c23e46b4b.pdf?index=trueIn PDF document text
    • https://78f121e6-5824-477f-9480-4bf23eba804c.filesusr.com/ugd/9564ad_33e7bf02aa27414ba12611f56bf1c758.pdf?index=trueIn 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_off0000f11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11A 5704 bytes
SHA-256: f6e896ceec18739feb091de4e470332bb5f7869d72c99b1055325d306b5ad2a7
font_01_sfnt_off00010478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10478 11980 bytes
SHA-256: 25dc40a7855b96222b18e130c5bff1b54271da92ef414948809b007987f88b4c

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