Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e366a58213f73e9…

MALICIOUS

PDF

82.9 KB Created: 2021-03-12 18:36:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c0d54489d88f1dc49ec572d7758fc66 SHA-1: 28ee2558cee1a1a0dba13d024531b04f69ab6559 SHA-256: 0e366a58213f73e9fea2b6c010e15f4693657abb2d0a32527974ffe04751e242
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with several pointing to suspicious domains and PDF files. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external link farm, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The embedded URLs suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=what+is+the+story+of+treasure+island
    • http://outputqwvk.space/zuwadutofudorexy6.pdf
    • http://oneitstore.pro/gakojepuvulikakemedidujeqryff.pdf
    • http://ridunculus.com/the_blind_side_book_free_downloadksba3.pdf
    • http://sreview.online/blood_and_guts_in_high_school_downloadf3m2d.pdf
    • http://antinomi.design/tipobosojixizzn7n.pdf
    • http://lulodexov.scienceontheweb.net/my_bloody_life_audiobook.pdf
    • http://naliputa.mywebcommunity.org/navuv.pdf
    • http://muzibatixabu.mypressonline.com/kukolejasixase.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_89a0d241873e4ddead32425ae915264e.pdf?index=true
    • https://s3.amazonaws.com/dudigonifu/glossary_of_geology_terms.pdf
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_84476374b44a4f6fa6149601544282ee.pdf?index=true
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_0f0d0b1a2df542be91209153edb739fe.pdf?index=true
    • https://s3.amazonaws.com/divelatoxa/geometric_probability_distribution_examples_and_solutions.pdf
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_d914118df1824611805a8016a7e3b45d.pdf?index=true
    • https://s3.amazonaws.com/sabobenuwe/zevelikiwako.pdf
    • https://uploads.strikinglycdn.com/files/57991f1b-10d7-4e7a-956a-d11213224611/matplotlib_scatter_size_of_dots.pdf
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_a40255ac04664782a54a872631bab2f6.pdf?index=true
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_c5316f1f04b34909adf1eb562a91fcbc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2018a2e3-9800-43b1-a1e5-69be6221b9de/how_to_reset_a_samsung_tab_3_to_factory_settings.pdf
    • https://s3.amazonaws.com/makumapikeze/fopemodeboz.pdf
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_454cedfcff334e5fb0a0baa26078d070.pdf?index=true
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_d43e0180742a466e86b43a7a22fc8254.pdf?index=true
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001086a.bin
dce0dc22ce6b51c910cf887d43011337427d6ddbac8524a5b82f0fb71e7ebe04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1086A 5112 bytes
font_01_sfnt_off000119d8.bin
3dc70bed777a3a7e697b7150cdea05b25de0661fe381dedc54acbefcea726efc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119D8 10732 bytes

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