Malicious PDF — malware analysis report

Static analysis result for SHA-256 af65bddaec381ea4…

MALICIOUS

PDF

42.3 KB Created: 2020-06-24 01:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2baba061b82271ceb92f710515398d5 SHA-1: 8f2a69f64c2c0118c011e79fe7d56594f8e4fcac SHA-256: af65bddaec381ea4f2cf29dbec40ff8a04dfc395fa75f3754af1915bdb37d648
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, many of which follow a similar numeric slug pattern. This suggests a link farm or SEO spam tactic designed to drive traffic to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URLs supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://rencai.bpmtc.com/uploads/1/3/0/7/130738988/130738988.html#soccer+coach+pdf
    • http://benincasaop.org/uploads/1/3/2/6/132695668/6001040.pdf
    • http://mail.waldenbrookfarm.com/uploads/1/3/1/0/131070178/d62f2.pdf
    • http://a-plus-medical-supplies.com/uploads/1/3/0/6/130620354/nofiwilotorufer-tixabiliwexijuz.pdf
    • http://roofinggermantown.com/uploads/1/3/0/4/130476076/zezimofedaxuf-nozuzaw.pdf
    • http://romhs.com/uploads/1/3/1/3/131381712/22fdb9e9.pdf
    • http://philipjbruce.com/uploads/1/3/0/2/130270792/ximitatimikoxivoduf.pdf
    • http://mail.speluqueros.com/uploads/1/3/0/5/130550910/87509f0f841.pdf
    • http://bangencreations.com/uploads/1/3/1/6/131606479/ce62f9a78.pdf
    • http://neonpalms.co.uk/uploads/1/3/1/4/131406621/fejopubi.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_off00006aba.bin
9cc095ebb00312b4909335b7d5b2528792f90deeb71a92520aff4167c8c5600b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABA 4692 bytes
font_01_sfnt_off00007a9e.bin
6f054ad27cc5b9c3948a2accf978a58a3aeea7c8d16ec28d6de54a6aec18542d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9E 10228 bytes

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