Malicious PDF — malware analysis report

Static analysis result for SHA-256 f991ef732cadc120…

MALICIOUS

PDF

35.7 KB Created: 2020-06-25 03:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 606c94d290a93c5be4814d33ec04dc8d SHA-1: 211bdb05cdee6f35c1196bcf82d1b6e6042d1c40 SHA-256: f991ef732cadc120937d6855249fd68476203b2ad5f57cacfda93114357c33ad
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The document body, though partially obfuscated, contains text related to 'Introduction to mechatronics pdf' and the same URLs found in the heuristics. This indicates a social engineering attempt to lure users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://flooringxpressllc.com/uploads/1/3/0/6/130639344/130639344.html#introduction+to+mechatronics+pdf PDF link annotation
    • http://wit-ism.com/uploads/1/3/0/2/130272470/9d750382.pdfIn PDF document text
    • http://spinaespresso.com.au/uploads/1/3/0/9/130969674/vabiwebesiteseravuve.pdfIn PDF document text
    • http://wellnesswithinpregnancy.com/uploads/1/3/1/1/131164310/gadafinixit.pdfIn PDF document text
    • http://5rainbowfilm.com/uploads/1/3/0/3/130313191/gabawir_vewegu_dapifoxufi_fupemumid.pdfIn PDF document text
    • http://reeceshomemadedoggietreats.com/uploads/1/3/0/8/130874403/316378.pdfIn PDF document text
    • http://rodriguezx.com/uploads/1/3/1/3/131383409/zezelufifufenano.pdfIn PDF document text
    • http://mrsflinksclassroom.com/uploads/1/3/0/6/130621780/5913581.pdfIn PDF document text
    • http://bullsnips.com/uploads/1/3/0/2/130289291/502781.pdfIn PDF document text
    • http://asesoresdesegurosmanejar.com/uploads/1/3/1/4/131412858/tosowese-kuwisodejus-salamuvupem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DFD 5184 bytes
SHA-256: 5825984e598534c313dfd8b045efe6e85d2ab0f7b8c9059a6e6f45c12d13550a
font_01_sfnt_off00005f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F63 10464 bytes
SHA-256: 58ba2b4949966cc943ad6a66600f0b8eb400c3df00c26d88ed17bbfdc31970ff

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