Malicious PDF — malware analysis report

Static analysis result for SHA-256 1717d4e376887c07…

MALICIOUS

PDF

84.1 KB Created: 2021-04-17 07:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9df4324fae1ae3c5b14c97cd05cd314a SHA-1: bb1d028caf403c69c4fd860f23f2ab98190ce6e4 SHA-256: 1717d4e376887c07000ec77ad2a19381a43e876b5a587f5dafde0a5af5bba01a
164 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, characteristic of a link farm or phishing campaign. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to deceive the user into clicking these links, likely for malicious purposes. The presence of embedded URLs and the ML classification strongly indicate malicious intent, possibly leading to a phishing site or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://dafemum.ru/strik?utm_term=introduction+to+data+science+with+r+-+data+analysis+part+2
    • https://cdn-cms.f-static.net/uploads/4404984/normal_604b4e98e7f9f.pdf
    • http://55571.ru/xedovaka7tf1g.pdf
    • http://egosikenclub.com/zobekusixa18uqe.pdf
    • http://naykaryadom.fun/racing_wheel_for_sale_near_mewdlgq.pdf
    • https://static.s123-cdn-static.com/uploads/4477655/normal_5ffe8fbc32eb2.pdf
    • https://cdn-cms.f-static.net/uploads/4380681/normal_605b8b5664c5a.pdf
    • https://cdn-cms.f-static.net/uploads/4464315/normal_604b0117bc1b1.pdf
    • https://cdn-cms.f-static.net/uploads/4466366/normal_5fe7e29288f1a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c948e902-2437-43f3-9f1e-7aaad30688a7.filesusr.com/ugd/464a75_407fa15e6afb4d718298fe040224c3cc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e9aa2ead-b74d-436b-811a-1e5d986efcd7/world_map_countries_outline_vector.pdf
    • http://lagefow.epizy.com/luwurudexedarudo.pdf
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_13c6e82b545b40d9b97dc22ec07bf491.pdf?index=true
    • http://sejanaxopuvogiw.epizy.com/xijeter.pdf
    • https://5613ab86-cfe5-4642-b9e1-29ab5e510d76.filesusr.com/ugd/79e000_59210e3a604b4757952e350bd9dbc275.pdf?index=true
    • http://perevis.epizy.com/pirates_of_the_caribbean_medley_sheet_music_piano.pdf
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_92b0eed3ab724a9cbb37fde9d211bee2.pdf?index=true
    • http://tawegoju.rf.gd/87218442053.pdf
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_fb91a3a4f7254023ac07fc5875d2140d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2c3e2366-6c9d-4b70-9351-0351682ffc70/relgio_masculino_casio_g-shock_ga-100cm-5adr_-_camuflado.pdf
    • https://uploads.strikinglycdn.com/files/b0cdca9c-1bc5-4757-9fe8-8d75cccfd6fd/is_diary_of_an_oxygen_thief_a_true_story.pdf
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_a71a9142d03340e3b46ae93631ccf118.pdf?index=true
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_f0a4fd8801184762ae2d7caf6d2ecd3e.pdf?index=true
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_cb8709c26f404f3a979599acc2d9fc7d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6dd5e94d-cbdc-4124-bad5-787da9377d54/23970084212.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105dc.bin
08cba8d37752c7435be2ec89acd4a1767b09c1eab937848671865bb4636d6ca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105DC 5456 bytes
font_01_sfnt_off0001187e.bin
495133c1966d619bb9706f50734b662730c2bf60141a6d7dd63698e586c48a75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1187E 11876 bytes

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