Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7cbae24ea014acb…

MALICIOUS

PDF

37.3 KB Created: 2020-06-23 17:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ebde20aefa3b6e85dae8ae95b6ea262 SHA-1: 813acf20ad4947f0b233c8efff90152655f7519a SHA-256: f7cbae24ea014acb1577169a2690609ceb78c4cab0650c12edb55f6fd8183b41
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which follow a similar pattern of numeric slugs and hostnames associated with SEO link farms. The document body, though heavily obfuscated, contains references to these URLs, suggesting a lure to a network of potentially malicious websites. No scripts were extracted from this sample.

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://rtcommunications.org/uploads/1/3/0/5/130551467/130551467.html#bath+tangle+pdf
    • http://joeyvijayam.com/uploads/1/3/0/5/130550951/xexojofalarev.pdf
    • http://ravenstede.com/uploads/1/3/0/6/130639905/64bb1a8dae9d.pdf
    • http://lindberghlightstheway.org/uploads/1/3/0/2/130288348/zimevo-sefekikegam-nomafa.pdf
    • http://jonathanjbell.com/uploads/1/3/0/5/130551247/6972839.pdf
    • http://geoenginc.ca/uploads/1/3/2/6/132695332/leteji.pdf
    • http://endoflifecompanions.org/uploads/1/3/1/6/131607103/tubonowofoxa-niwusotoj.pdf
    • http://sophistable.com/uploads/1/3/1/3/131383646/lifozasaj.pdf
    • http://mta-sts.mx.erainnawinnett.com/uploads/1/3/1/0/131069961/leduzijugav-kilejid-wejunamatefe-gukarujax.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005624.bin
640491d21d97bfd650b0b6b3950f85ffec4d87e7a06e5e0af387436a5ff7c326		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5624 4708 bytes
font_01_sfnt_off00006620.bin
7dc79f47814e04983ac2e54b1fce6a1727b2da4eb67e59d246725deaaf6b78b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6620 10280 bytes

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