Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a00eda4dce0f110…

MALICIOUS

PDF

41.8 KB Created: 2020-04-17 23:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 422dd930fc97df521dfa9e0d652e47c7 SHA-1: c91fedfb79360bed532d5016f7403a78b47a3f9e SHA-256: 1a00eda4dce0f110aa33358eb70237a106281b8a4e47e1279afd367848ec812b
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document is designed as a lure, presenting itself as 'Organic chemistry test questions and answers' to entice users. It contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. This suggests a link farm or SEO poisoning tactic to drive traffic to potentially malicious or spam content. No scripts were extracted, limiting the analysis of direct payload execution.

Heuristics 3

  • 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
  • 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://graffitiremovallasvegas.net/uploads/1/3/0/6/130604500/130604500.html#organic+chemistry+test+questions+and+answers
    • http://lakesidebmbhoa.com/uploads/1/3/1/3/131381781/8628129.pdf
    • http://seminalcomic.com/uploads/1/3/0/4/130489431/xepat.pdf
    • http://ncpennington.com/uploads/1/3/0/7/130775529/bepabomi_zidex_sesupu.pdf
    • http://ashleywrenacupuncture.com/uploads/1/3/0/4/130436068/zukuzelo.pdf
    • http://marcrosoft.com/uploads/1/3/1/3/131381363/tiputa-jinilopi-rigifuxasamowiz-pamamat.pdf
    • http://staceyward.com/uploads/1/3/0/7/130739655/babolejewelojozev.pdf
    • http://pslpromo.com/uploads/1/3/1/6/131606670/2315310.pdf
    • http://meowluxcathotel.com/uploads/1/3/1/3/131382491/memipobuvunuduze.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078ef.bin
08bdea42a95c7f15742a00d8632b1850d477bfa72dc20957ca7e58c9e2937a37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EF 8852 bytes

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