Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e050bdd5cfb601…

MALICIOUS

PDF

41.6 KB Created: 2020-04-03 03:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8fcc0b2e1447c5328b7e074aaaff1cd7 SHA-1: 198403c92e59000136e01ad77a858fee5da26119 SHA-256: 15e050bdd5cfb601f4fc2134da2d8a05b91c77e1df0511342d5d083e5e8bf3f6
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to materials science and also includes several of these links. This suggests the primary purpose is to direct users to external websites, potentially for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://kickgenius.com/uploads/1/3/0/5/130540869/130540869.html#caracteristicas+de+los+materiales+conductores+semiconductores+y+aislantes
    • http://jenniferroseoneal.com/uploads/1/3/0/3/130323219/a442a.pdf
    • http://nvrset.com/uploads/1/3/0/7/130776300/wodugajamepudomodu.pdf
    • http://vahomesinmanteca.com/uploads/1/3/0/2/130272909/a561a80.pdf
    • http://fagundesspeechcenter.com/uploads/1/3/0/7/130776720/8785127.pdf
    • http://abbeyrdcapital.com/uploads/1/3/0/5/130540040/kirufifod.pdf
    • http://sharypoppins.com/uploads/1/3/0/8/130814471/657935cd4e58827.pdf
    • http://anthonyong.com/uploads/1/3/0/4/130476804/43c84.pdf
    • http://yourdailypayout.com/uploads/1/3/0/3/130379317/6800925.pdf
    • http://zircondevelopments.com/uploads/1/3/0/6/130604192/7353398.pdf
    • http://awarenessforthebetter.net/uploads/1/3/0/5/130589354/2666b9f700.pdf
    • http://pinturasvs.com/uploads/1/3/0/6/130620705/jarixe.pdf
    • http://pressurewashinghendersonville.com/uploads/1/3/0/3/130323159/7873511.pdf
    • http://incomewebstores.info/uploads/1/3/0/4/130488583/a52c388f2.pdf
    • http://samfi.net/uploads/1/3/1/3/131379846/066b89a.pdf
    • http://pct4career.com/uploads/1/3/0/8/130814238/mufororapere.pdf
    • http://fixitu.com/uploads/1/3/0/5/130589114/10f1415485f75.pdf
    • http://finepointwedding.com/uploads/1/3/0/9/130969399/f1241.pdf
    • http://poseidonpowerkft.com/uploads/1/3/0/4/130488362/d65fad004.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f5b.bin
a0f57479b7a15e2b5b2618f44c5239d245d59b9ebe9aa1381479d985a39afe6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5B 8324 bytes
font_01_sfnt_off00008dc6.bin
cfb3357b20fb01955c1e4a0ed568c791e3a97db8f0fbaa18432a833eaa1d19da
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC6 2828 bytes