Malicious PDF — malware analysis report

Static analysis result for SHA-256 0719e1ff207e6bfa…

MALICIOUS

PDF

84.6 KB Created: 2021-03-26 05:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e17ebdce3e795fb09d6386441aed2ecf SHA-1: 203376fe694adc7d64918ff2041b33f51947ab7b SHA-256: 0719e1ff207e6bfa3c8a0aac71d8de0c5f09e68c10b89d189b05e55de3de5010
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external websites, many of which are flagged as suspicious or unknown. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting a phishing or scam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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-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://maypoin.ru/wix?keyword=critical+ops+apk+unlimited+money
    • http://help-feedback-amzn3.xyz/61939089320nd6me.pdf
    • http://silkhfig.bid/borges_the_immortalrm5hp.pdf
    • http://justiciaforjustice.com/54922834677hnatd.pdf
    • http://instapriz.website/mixing_and_mastering_in_fl_studio_2092odz.pdf
    • http://ing-cliente.com/ata_chapter_25dkor8.pdf
    • http://kittyplay.online/jesimilonewixazjjh2.pdf
    • http://guvorib.22web.org/baukindergeld_gesetzentwurf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_c5dfaacc48594cdeab10d462c3619e67.pdf?index=true
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_683d196477e34b0faa4094349e10ce01.pdf?index=true
    • http://talakukatutevib.epizy.com/leripijafovowiwabuwasu.pdf
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_b7351cb6113a443981c8b03ba728c162.pdf?index=true
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_0aeaa5f77272462aab9c28f3a4918e25.pdf?index=true
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_03171c7fda5b42b5b28eb0c4cd59680f.pdf?index=true
    • https://s3.amazonaws.com/marimejerebo/12366019700.pdf
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_634dc08429924a69b90477e6c19fb31a.pdf?index=true
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_4904b63fdaa0439f999daf97ba2b1ece.pdf?index=true
    • https://s3.amazonaws.com/dixaleko/85192020606.pdf
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_7e90290ca43547cdbaffc798bc3b055b.pdf?index=true
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_8396c609c2c24e28b3fa69fc74a9e0cd.pdf?index=true
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_9f337cd83dfd4f9b9260343215b62816.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103e6.bin
0b35fb18c064fef04bc6796205a638126b6d026389f4cdf9d5e30f2df85b2f1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E6 5288 bytes
font_01_sfnt_off000115cb.bin
c2d2ea8c7d85171e55cfb84224172dd0678b2fb401fe41a8a7ee063557722b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115CB 2332 bytes
font_02_sfnt_off00012030.bin
0f7db43ab7d4cbe181625ad1ed6a9abc4eec33f27907f708b8b04f6115ca4cc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12030 10764 bytes

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