Malicious PDF — malware analysis report

Static analysis result for SHA-256 8508b042a507a5ce…

MALICIOUS

PDF

90.3 KB Created: 2021-04-02 04:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e754d066f3d8263c73bcf2e234aaed9f SHA-1: 54ba280806bd50a5bfa534b278973bf51a9bf40b SHA-256: 8508b042a507a5ce7a63607db1e7df1bc17b36f4b0b0485ed89c4831479f8296
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic findings point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://resalured.ru/strik?utm_term=photoshop+cs6+shortcut+keys+pdf+in+hindi
    • https://zobezefifoluza.weebly.com/uploads/1/3/5/3/135306737/jevonovasi.pdf
    • https://vevatujiv.weebly.com/uploads/1/3/1/4/131482893/5486102.pdf
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/zekusuxujejoxa_tukug_waviwelufolataf.pdf
    • https://bodakipufasedoj.weebly.com/uploads/1/3/5/9/135972884/4070b0b03b9a45f.pdf
    • https://lebotisoko.weebly.com/uploads/1/3/4/5/134597635/7555057.pdf
    • http://tepifugamokeg.medianewsonline.com/9mm_sig_sauer_p938_vs_p238.pdf
    • http://jivavesomuviz.getenjoyment.net/76945082752.pdf
    • https://kulojavovapevim.weebly.com/uploads/1/3/4/7/134746555/2223e20b8c4.pdf
    • https://kozamenarolu.weebly.com/uploads/1/3/2/6/132682647/056c4.pdf
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/f2851aa1aff53be.pdf
    • http://tarezirok.mypressonline.com/the_enormous_crocodile_story_book.pdf
    • https://xokebewogaxuwu.weebly.com/uploads/1/3/4/5/134588239/lawuragedawifesemid.pdf
    • http://volulolusawaz.mygamesonline.org/50074242723.pdf
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/8053961.pdf
    • http://nezowigivomi.scienceontheweb.net/92414729599.pdf
    • https://zokukomusisitu.weebly.com/uploads/1/3/5/3/135323242/1d06863ba70b5e1.pdf
    • https://lukumupanulafaz.weebly.com/uploads/1/3/4/6/134683212/7007640.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dowafirowelumex.atwebpages.com/nodomuwozonaliwaxof.pdf
    • http://pizuzol.onlinewebshop.net/70553704348.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100cd.bin
b89c0e94de8493213350c9ee14e559006c95593b080e6720a412775e280cefa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100CD 5204 bytes
font_01_sfnt_off00011281.bin
f792ee10ea6094d7f0a0e3a1c4d361341e8dc31fd119731aeb89fdc9675c1894		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11281 10760 bytes
font_02_sfnt_off00013798.bin
4ff8de031e26ee870ed4622d57df4318a760d272b7a3006b3935db219ef5d477		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13798 16460 bytes
font_03_sfnt_off00014d78.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D78 4324 bytes

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