Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e10d7a019dfd29…

MALICIOUS

PDF

83.2 KB Created: 2021-05-16 15:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4ec790ce24e1c71c120e17baed04d7a4 SHA-1: 22d290289a47b9277fda4f3798a6e6d566f334fd SHA-256: 94e10d7a019dfd299c1d2fce86b9153097ada589bcbee4c8e33dc797c59bd899
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=word+problems+involving+special+right+triangles+with+solutions PDF link annotation
    • http://ravigimojamel.mypressonline.com/learning_processing.pdfIn PDF document text
    • https://mizemajawoxulu.weebly.com/uploads/1/3/1/4/131437858/jofufurukekutu_zurubozuke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385634/normal_606de316edb33.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/faviwoxopupobid.pdfIn PDF document text
    • http://zoxuruje.sportsontheweb.net/41284987080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476127/normal_6041a93754404.pdfIn PDF document text
    • http://cardio-natural.info/26982219337od9kq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_604aa5aa76536.pdfIn PDF document text
    • https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/zisisazasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496193/normal_601f0fdbc893d.pdfIn PDF document text
    • https://lodofimedama.weebly.com/uploads/1/3/4/3/134327961/kiribuvavuzuf.pdfIn PDF document text
    • http://palitra-cveta.ru/wizexularizalinokasipupiry3dn0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426541/normal_60625dc20a8e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lizuratudesaxop.epizy.com/avatar_movie_telugu_lo_ing_hd.pdfIn PDF document text
    • https://229c0a76-8cd2-4a6d-ad64-a548a1436bbb.filesusr.com/ugd/f9ed01_d6415ad5d4fc4ad199371a26ba56e38e.pdf?index=trueIn PDF document text
    • http://tirixerunifadi.rf.gd/bts_persona_album_zip_deviantart.pdfIn PDF document text
    • http://gozipoxux.rf.gd/folizuzijududu.pdfIn PDF document text
    • http://kagijido.myartsonline.com/descriptive_adjectives.pdfIn PDF document text
    • https://90138cf2-752b-46b9-a396-1872e0473e42.filesusr.com/ugd/02203e_3adf4302427f41ecae148d34a34b004d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 5792 bytes
SHA-256: 5732c1887a5f453d06ba67bd7516626c73879d6549f60e320e0935de7338aa3c
font_01_sfnt_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 11984 bytes
SHA-256: a942badb6238670b3bd1305949c86533d49faddf908adf718325b8cf105c85e5
font_02_sfnt_off0001299c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299C 16100 bytes
SHA-256: de7e088778b527ed18caa1a7ce18fcb53167a9614b7c0cfe6eb9ba3e1aa70e31

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