Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf0f2f892a6938c…

MALICIOUS

PDF

39.5 KB Created: 2020-05-14 14:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 719ad1316de966526400fd5dbaffee8d SHA-1: 7cc440a34b2c20b5bf389c07a43546f4d398f5a4 SHA-256: edf0f2f892a6938c40f51648a4f209346d5f632c4531bab5c65b243633990fef
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, each hosting a PDF file with a numeric or book-related slug. This suggests a link farm or SEO manipulation tactic, potentially used to distribute malicious content or improve search engine ranking for malicious sites. The document body itself is heavily obfuscated but contains some of the same URLs.

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://womensfictionbookreviews.com/uploads/1/3/0/5/130539810/130539810.html#uniform+boundedness+theorem+pdf
    • http://jsventuring.com/uploads/1/3/0/2/130289776/b10cc91757d1.pdf
    • http://ambstyles.com/uploads/1/3/0/7/130775299/1704927.pdf
    • http://elitefiberglassrepair.com/uploads/1/3/1/4/131410597/3de1fea772.pdf
    • http://bchomeinspections.net/uploads/1/3/0/4/130483539/7526df2fdb2ce.pdf
    • http://spotithomeinspections.com/uploads/1/3/0/2/130289601/bopijani.pdf
    • http://brazilian-samba.com/uploads/1/3/0/6/130604386/3448595.pdf
    • http://clayerly.studio/uploads/1/3/0/4/130483871/xonivuzuwul-zikalepo-gubijapunagume.pdf
    • http://futurematterssecondchance.com/uploads/1/3/0/3/130324292/5455657.pdf
    • http://longhorncaverns.info/uploads/1/3/0/3/130312925/3c2732c6.pdf
    • http://vertudevelopment.com/uploads/1/3/1/3/131398174/8609968.pdf
    • http://kodiegerritsen.com/uploads/1/3/1/3/131379987/podonelotefut.pdf
    • http://jesianequeiroz.com/uploads/1/3/0/7/130738836/zajojupu_kusapup_xazopifajexetow_pedifapamatipo.pdf
    • http://edmbeautybar.com/uploads/1/3/0/6/130620936/92d17.pdf
    • http://intelligen.energy/uploads/1/3/1/4/131438305/71a7a10.pdf
    • http://carringtonandfinch.com/uploads/1/3/1/6/131606169/3558359.pdf
    • http://lacasadarte.com/uploads/1/3/0/4/130483155/9a637ad614.pdf
    • http://goldstarauto1.com/uploads/1/3/0/4/130483477/45a74fa6b8e.pdf
    • http://cardinaltranscribing.com/uploads/1/3/1/4/131482916/9767a84f.pdf
    • http://jp.encognize.com/uploads/1/3/0/6/130622047/wipiwipeb.pdf
    • http://taylor-construction.net/uploads/1/3/1/4/131437425/favexob_fomufer.pdf
    • http://cardinaltranscribing.com/uploads/
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058ea.bin
5eb430f1496838c266c00aa87fa0ace3b6bf06b217c05cac18204bb9da558ee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58EA 10248 bytes
font_01_sfnt_off00007c35.bin
a0532d1212509dae036733b1fb6f303b0d7fd7a209d3928fdad713008da19d30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C35 16144 bytes

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