Malicious PDF — malware analysis report

Static analysis result for SHA-256 c768359bcfcef0fe…

MALICIOUS

PDF

42.1 KB Created: 2020-03-10 13:05:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 508ace39f1e7b18b09404be933b87361 SHA-1: ebfbf96b6e995a096903d415fae97ee74573f885 SHA-256: c768359bcfcef0fefd7e7507c3ccb84d69f4bfa43ec1d479b0ff0b248d300694
62 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though heavily obfuscated, contains text related to 'Ieee std 829 software test documentation' and references the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The primary goal appears to be directing users to these external URLs, which are likely part of a link farm for SEO manipulation or to host phishing content.

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://hotelfullerton.devsite-1.com/uploads/1/3/0/5/130588936/130588936.html#ieee+std+829+software+test+documentation
    • http://nokia-review.com/uploads/1/3/0/7/130740133/nixutemelekowadas.pdf
    • http://brendanfletcher.com/uploads/1/3/0/5/130545475/69ef4a3f480207.pdf
    • http://magicalforestvday.com/uploads/1/3/0/5/130538842/bigipeleforara_zerufoludamow.pdf
    • http://mail.aspenhillqtrs.com/uploads/1/3/0/7/130776804/benalepavezexa.pdf
    • http://characterbasedhiring.com/uploads/1/3/0/5/130588256/35ddf3d.pdf
    • http://ninacibulka.com/uploads/1/3/0/2/130272270/lajixavemilede.pdf
    • http://www.vertesquare.com/uploads/1/3/0/5/130589156/6171539.pdf
    • http://hotelbliss.org/uploads/1/3/0/7/130776349/gopon.pdf
    • http://keybiscaynetennislessons.com/uploads/1/3/0/2/130289284/boxesopo.pdf
    • http://stevehayescreative.com/uploads/1/3/0/7/130776230/ca11ff0e1a9814.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_off000079ab.bin
1d778c19f56bacf9fecb0a9588aa6dfa8acd5a7bea455050fa9f5140446a78b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AB 8196 bytes

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