Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa11d6cbbab69ca…

MALICIOUS

PDF

93.4 KB Created: 2021-03-23 05:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b9b01c80f37f7f40b070d11e977e5584 SHA-1: 26475d341afee0892c8314c5583f1461dd9993c2 SHA-256: 3aa11d6cbbab69ca0fa7c2d7c2a56973db724010ff7e367cb071358fb005947c
226 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggest the document is part of a multi-stage attack, potentially leading to a password-protected archive or further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://baarspo.ru/award?keyword=arduino+code+for+dc+motor+control+pdf PDF link annotation
    • http://noksipals.online/amritsar_city_mapua5v2.pdfIn PDF document text
    • https://jovopunok.weebly.com/uploads/1/3/4/8/134869647/2205463.pdfIn PDF document text
    • http://wildber.store/40281255417n0n0z.pdfIn PDF document text
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/zarimurewuxibo.pdfIn PDF document text
    • http://tixanijematewe.mypressonline.com/juwibukunokavudigeroli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2e4b0ed6-c237-476e-b23b-7c95f147629f.filesusr.com/ugd/30e930_2ea891befef64ad78557fa79ce5d4adf.pdf?index=trueIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_69a99093e4424dfcb9bc2885914d35db.pdf?index=trueIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_a98221c0dca34070b6ccfe91a974a0ec.pdf?index=trueIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_2b2d79c336294edf941cdd679c42f94b.pdf?index=trueIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_9361f573fd54440497c8ade673027a21.pdf?index=trueIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_1571d6096e7443bbba28194f4c01173d.pdf?index=trueIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_c7ef0e8ba5c34305966129abebf6c5f2.pdf?index=trueIn PDF document text
    • http://xiwexuxe.atwebpages.com/19447476597.pdfIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_0d0f777111e74376889f96281f0410c6.pdf?index=trueIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_472cb3fe68c54f1db6c08b65cbfd389d.pdf?index=trueIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_bef65bdba0694403b7570e0f96069b38.pdf?index=trueIn PDF document text
    • http://tibutariwu.myartsonline.com/l_amore_ai_tempi_del_colera_download.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_9152ad1bca6b4ce8bf93e033bd273487.pdf?index=trueIn PDF document text
    • http://pajupevezujugut.atwebpages.com/resonefujobujovir.pdfIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_d8e56cd51be440a680219d40f50badb8.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10755 4900 bytes
SHA-256: 4f020fc64a9995de9d86a126cc222b4c03ff402c50946ffccd6b69ddca8a0f68
font_01_sfnt_off000117ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EA 5720 bytes
SHA-256: 9c09e73c082d97af048b78e6bc67e5e0b413cb761ec49481a2403e9ff326c3bd
font_02_sfnt_off000127d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D7 12628 bytes
SHA-256: a0ac6e265284c0b500f249c972f3a0f952b63acacb9d3db5275b49859e8372d3
font_03_sfnt_off00015314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15314 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1

Open this report in the interactive analyzer, or submit your own file for analysis.