Malicious PDF — malware analysis report

Static analysis result for SHA-256 2583e23c4a4dbf59…

MALICIOUS

PDF

33.0 KB Created: 2020-06-14 19:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 202788e906f7e782bfc616a1696e5d16 SHA-1: 97c50625f34bcbd2f7fb00587a8d904019844344 SHA-256: 2583e23c4a4dbf59d55c4e9f4d95554542cd07c3875abfc59abb2f8c3987ef4f
96 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, suggesting a link farm or SEO spam campaign. The ML classifier also strongly indicated maliciousness. The document body contains text related to a bead necklace tutorial, which is likely a lure to disguise the malicious intent of directing users to numerous external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://motherdaughterdesigns.com/uploads/1/3/0/7/130775275/130775275.html#bead+necklace+tutorial
    • http://showemwhothegreatestis.com/uploads/1/3/1/0/131071066/e237d05d417a.pdf
    • http://ekoamiko.org/uploads/1/3/1/6/131606540/bizef.pdf
    • http://ebenezerhaitianbaptistchurch.com/uploads/1/3/1/8/131856200/fudubefupo.pdf
    • http://webmail.paintingsbyhelen.com/uploads/1/3/0/7/130775191/vurenapupura.pdf
    • http://coastarchitect.com/uploads/1/3/1/4/131408092/6033169.pdf
    • http://soltisoft.com/uploads/1/3/1/3/131380944/gedezubogumow.pdf
    • http://hotproductstore.net/uploads/1/3/0/6/130621603/d947caf9.pdf
    • http://outlook.sirmightymoose.com/uploads/1/3/0/6/130639459/1999089.pdf
    • http://dfainvestigations.com/uploads/1/3/0/9/130969428/524890ad4feb476.pdf
    • http://ajayleister.com/uploads/1/3/1/8/131856380/tuwivufal.pdf
    • http://wcd-1199sab5.mgh-r.ch/uploads/1/3/2/3/132303269/7387318.pdf
    • https://wovigesop.files.wordpress.com/2020/06/2873767410.pdf
    • https://fopufogibeg.files.wordpress.com/2020/06/65417552090.pdf
    • https://vupujejuwozo.files.wordpress.com/2020/06/xadanidobilirutukebutaw.pdf
    • https://wonafuburos.files.wordpress.com/2020/06/gagimi.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_off00005637.bin
d8d3be32802078b3d2aa53c74d1238de38b4cba8d23b902e7ae06ea569c5d137		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5637 10200 bytes

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