Malicious PDF — malware analysis report

Static analysis result for SHA-256 63063598ab478b85…

MALICIOUS

PDF

68.6 KB Created: 2020-11-17 03:52:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c71026d042b2e46b2432ce6c0dcb9dc7 SHA-1: 29ff8b8550100cc996c8d76d8373a085254687ee SHA-256: 63063598ab478b850e48154c8b4519f34c221b81c5519a044aca66281ca66e18
156 Risk Score

Malware Insights

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

The PDF contains an embedded URL that appears to be a lure for downloading software, indicated by the 'kodi 14 helix apk download' in the URL and document body. The heuristic PDF_SEO_LINK_FARM suggests a large number of external links, many pointing to S3 buckets, which is a common technique for hosting malicious content or redirecting users. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://traffking.ru/123?utm_term=kodi+14+helix+apk+download
    • https://cdn-cms.f-static.net/uploads/4461786/normal_5faa7d5fe8812.pdf
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/sodopifafikum.pdf
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f991c6ac7682.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xumakomowi/5_letter_words_with_letters_garlic.pdf
    • https://s3.amazonaws.com/somamere/92437334000.pdf
    • https://s3.amazonaws.com/lanowilovuviwib/northern_puffer_fish_poison.pdf
    • https://s3.amazonaws.com/leguvefu/47063256658.pdf
    • https://s3.amazonaws.com/lijulijowivaze/effects_of_deforestation_on_climate_change.pdf
    • https://s3.amazonaws.com/mexavofezoxi/88255848754.pdf
    • https://s3.amazonaws.com/nezanurugega/81194269375.pdf
    • https://s3.amazonaws.com/gafedupeba/37753831223.pdf
    • https://s3.amazonaws.com/dubiditiginowo/domizibep.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d148.bin
a220bdc199159983fe3f14676a78e445a7965b76aa0bc47bdd9912f7af07c5b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD148 5108 bytes
font_01_sfnt_off0000e2c5.bin
bfd2079f7242c32925fa1bc194cf702c6414641d516154d793a3ba8c3b0ee106		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C5 10324 bytes

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