Malicious PDF — malware analysis report

Static analysis result for SHA-256 065835214e57cd96…

MALICIOUS

PDF

85.5 KB Created: 2021-03-23 10:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 34c486fc4b548d1e54ea6a65c51e60e5 SHA-1: b07900162bd0f4f08c736f9e30def36bd1ac3c48 SHA-256: 065835214e57cd96ccdb1b2cd0af43514ebc2fa8cc070eea3a41c707fe342749
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=ejemplos+de+causa+y+efecto+para+ni%25C3%25B1os+en+ingles PDF link annotation
    • https://tedajurilazunu.weebly.com/uploads/1/3/0/7/130739962/soresirufon.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/how_do_i_log_into_my_cloud_key.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/medegilarejelesebo.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/gbnjjie/firerixapi.pdfIn PDF document text
    • https://cdn.sqhk.co/dikozogub/bhdhehi/56145848280.pdfIn PDF document text
    • https://lukafitujukeme.weebly.com/uploads/1/3/3/9/133997152/ce43c9c03eeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_6035bcaca681d.pdfIn PDF document text
    • https://kuvobawodamelis.weebly.com/uploads/1/3/5/3/135350379/5531754.pdfIn PDF document text
    • http://vofufime.mypressonline.com/bosch_300_series_ventless_washer_and_dryer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483089/normal_5ff3ac87713b6.pdfIn PDF document text
    • https://kimidevi.weebly.com/uploads/1/3/4/0/134018720/bebipaxolunaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466661/normal_5fd88543aaaf1.pdfIn PDF document text
    • https://gevexivojuler.weebly.com/uploads/1/3/4/4/134444242/fasalutumivajovonogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_566390f276b1448497fe108e68627e63.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_29889e274b2d460e8abd894bc7fccc95.pdf?index=trueIn PDF document text
    • https://7043ee2c-bc2d-4d46-b82c-b0075177c1aa.filesusr.com/ugd/f862b5_5173ac46022a4798b3bc3ddd23959680.pdf?index=trueIn PDF document text
    • http://bepolujogox.atwebpages.com/merovevipolaro.pdfIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_7c90a42ec6f14442b10784669009b3b3.pdf?index=trueIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_742cb3554505477c85c173ca5e4fb0df.pdf?index=trueIn PDF document text
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_6a6a483a1fe142cea8a23497a1ea5c44.pdf?index=trueIn PDF document text
    • https://7e079b21-6cfc-4bbc-a8af-001f4930a7f2.filesusr.com/ugd/f66805_1265c5bc3af94390941bc82154b90fbf.pdf?index=trueIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_ef477b13210b4e4d91dc3951bd59e77e.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FA 5820 bytes
SHA-256: 0cec9b22598409948a59f21d5d819a5c7a87afa98dfc058e16e55a7761e1a0e4
font_01_sfnt_off0000f98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98B 12040 bytes
SHA-256: 1df374a6553f8c1e148a6472b3d10ca05639629511ae9537d63c0b0436f0490a
font_02_sfnt_off0001211e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211E 16192 bytes
SHA-256: 08061ebb9566a1d40b25d7fdbe94a31a1d110e8dca3eebf756672e1f768f3409
font_03_sfnt_off0001363e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363E 6068 bytes
SHA-256: 31e8474ebdef35f2835c13990952c807d0b13e494056b4bd3c1a38b48aaa2b71

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