Malicious PDF — malware analysis report

Static analysis result for SHA-256 aece98759f5bb5d8…

MALICIOUS

PDF

78.0 KB Created: 2021-01-27 14:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 18eefbd235b1e4315d1c888cb0a7bcfd SHA-1: 66621d7def51c62db7bd346cfc385af509b76468 SHA-256: aece98759f5bb5d8ac097bc77c4e57075b1a3f1752ea830343c61d8c4cc63bae
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically mentioning 'galaxy attack alien shooter pc game', suggesting a lure for users interested in games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are likely malicious or part of a phishing campaign. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffnew.ru/wb?keyword=galaxy%20attack%20alien%20shooter%20pc%20game PDF link annotation
    • https://putonikasobex.weebly.com/uploads/1/3/1/0/131070178/8995154.pdfIn PDF document text
    • https://fonevufaj.weebly.com/uploads/1/3/4/4/134444269/bagepuwal-kozevakaso-wuluriwalo-buxuxuvovem.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/losolenufox_xabalepomet_wojij_bajikomufejob.pdfIn PDF document text
    • http://mosquito.codes/fobixivudopuko4gg3z.pdfIn PDF document text
    • https://buzubexod.weebly.com/uploads/1/3/4/0/134017192/7920c62bbfb.pdfIn PDF document text
    • https://kapegidaboxisi.weebly.com/uploads/1/3/4/5/134527108/levumu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/lopetonefo.pdfIn PDF document text
    • http://residarifuwus.rf.gd/76421735679.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/53725711689.pdfIn PDF document text
    • http://kubozivomojiva.epizy.com/wanide.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/modified_acme_thread_form.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/90961433919.pdfIn PDF document text
    • http://ximitexus.epizy.com/gemaniwusolez.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/kudozubejan.pdfIn PDF document text
    • http://kevatudoritek.rf.gd/outlook_email_settings_android.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A1 5612 bytes
SHA-256: 262b3a5b38316a6d9ed6cc9f0fb50c2ee9fabe64da3edbfc80e954dbad428b40
font_01_sfnt_off000106a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A3 10632 bytes
SHA-256: 10b0fc193ea70770cd718254adb23cd6f7a12c3babb1b21487e17b38c5268c86

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