Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca3bd8bf3af6c75…

MALICIOUS

PDF

101.3 KB Created: 2021-03-14 11:17:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: a92dccb3a06d85086773a8350f27b5eb SHA-1: dfd3e4220ca23940bb2466b75af25833585c3a56 SHA-256: 0ca3bd8bf3af6c7504b9135bc1016e1f72fc8bb42181c5b2321cd48fdcb55226
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous embedded URLs suggest the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the nature of the embedded links and the PDF format itself often leverage JavaScript for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://soxebez.ru/123?utm_term=twilight+breaking+dawn+part+1++hd PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424341/normal_600073d2b1a49.pdfIn PDF document text
    • http://slmit.space/28778782749adx2f.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/is_there_a_season_2_of_big_little_lies_on_hbo.pdfIn PDF document text
    • http://fishland.store/gupawokovonumetuzadakenfcf1r.pdfIn PDF document text
    • http://pribor-poverka.site/zojepewiwapohwplj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405930/normal_5fd60be8034b7.pdfIn PDF document text
    • http://wrinklestiltskin.com/mepetutulawukitekinitowrkgb.pdfIn PDF document text
    • http://fitnesspack.net/49627203763wsxim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497658/normal_5fdc2c029a828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496584/normal_5feff06e1d61a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409238/normal_60075c18b5fd0.pdfIn PDF document text
    • http://damvglaz0.xyz/99393941497kslgf.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/acid_rain_introduction.pdfIn PDF document text
    • https://nopiwevupemaro.weebly.com/uploads/1/3/4/6/134653234/nebakukigijavun.pdfIn PDF document text
    • http://erogan-oficial.site/61780265037jdnsl.pdfIn PDF document text
    • https://zugavalomiseba.weebly.com/uploads/1/3/6/0/136082075/1896157.pdfIn PDF document text
    • http://www.opentle.orgIn 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
    • https://s3.amazonaws.com/poguvelefa/mofokinix.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/nuxabarisox.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001205a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1205A 13708 bytes
SHA-256: 8c98af7a732d556aadff2c370f312e59313c011ad81c688d35030fb9a365e325
font_00_sfnt_off00010e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2F 5340 bytes
SHA-256: 73e72d7577d1d8be6b7e6b0db522a6b3885e8b7d35189aaa63f98fee0c7e68ac
font_02_sfnt_off00014769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14769 14280 bytes
SHA-256: 24e05dcd3b7213830990e624d4b9e1338d2cc991615dfc3d04dd2f2630cf164d
font_03_sfnt_off000175c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175C7 4244 bytes
SHA-256: 7056b646e4047a92a0e735d515fe9076ff3ca67f88e79cb785c818efb5bb0c0a

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