Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eca2525c8a669f6…

MALICIOUS

PDF

48.4 KB Created: 2020-03-30 15:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d78ebb5929521ed08debb1517658bf9b SHA-1: 4522a3bbf5ffa52dd071f08da5fe014dd37bf12a SHA-256: 1eca2525c8a669f6df9f37433ed9c3ef1193f5e65928dee6f5d35f8e5938d87f
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to similarly structured URLs on different domains, indicating a link farm. The ML classifier strongly flagged this PDF as malicious. The embedded document body text contains SQL error messages, suggesting a potential attempt to exploit or mislead users interacting with database-related 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://adsl-63-204-18-8.benefitplans.org/uploads/1/3/0/7/130739852/130739852.html#sqlcode%3D-420+sqlstate%3D22018+sqlerrmc%3Ddecfloat+in+db2
    • http://greenwichgems.com/uploads/1/3/0/5/130539115/8846171.pdf
    • http://creditelevationhandbook.com/uploads/1/3/0/7/130775647/gobabobigitosexikodo.pdf
    • http://doublettango.com/uploads/1/3/0/5/130588278/4216942.pdf
    • http://pearlwonders.com/uploads/1/3/1/1/131164430/8291787.pdf
    • http://seward.solutions/uploads/1/3/0/4/130476180/02aa55eafba2c0c.pdf
    • http://robertmcwhorter.com/uploads/1/3/0/6/130621457/4080211.pdf
    • http://ta-walters.com/uploads/1/3/0/6/130603715/15a7415.pdf
    • http://captainkickstand.com/uploads/1/3/0/8/130814329/vogojejudumugesi.pdf
    • http://skiwithme.net/uploads/1/3/0/3/130323547/fudajid_lukusar_zitugagopefo_watuwavoros.pdf
    • http://umorebrand.shop/uploads/1/3/1/1/131163634/077e7c2.pdf
    • http://marketing-shoulder.com/uploads/1/3/0/7/130739927/1079c4ed1.pdf
    • http://adentauk.com/uploads/1/3/0/4/130476519/f8cb98e41b0.pdf
    • http://epicmafiamentorship.com/uploads/1/3/0/9/130969211/pevedazi.pdf
    • http://filmsolo.org/uploads/1/3/1/3/131398294/birozukametove.pdf
    • http://greenmarketdfb.org/uploads/1/3/0/7/130776324/2709d8d59a4.pdf
    • http://yungthach.com/uploads/1/3/1/1/131163836/kunulidi.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_off00007a4b.bin
70ba0ff1b0b0071cf5ec154341698054f9e6478e7cffd143083dd055e47f5644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4B 9640 bytes
font_01_sfnt_off00009ec8.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC8 16036 bytes

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