Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b99b560162b55af…

MALICIOUS

PDF

42.8 KB Created: 2020-03-29 14:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b6e5d1e0601934adae5157ce923f26a9 SHA-1: 86ad754bc7cf3f6044f6053609b443e966ee5a2e SHA-256: 1b99b560162b55af0877ce3d8b6ff06a77076bb9f0959dfedcc9d4c6abc11814
92 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 of which are numerically or generically named, suggesting a link farm or SEO spam operation. The document body, though partially corrupted, contains a title related to weather factors and references the wkhtmltopdf tool, indicating it was likely generated programmatically. The primary malicious activity observed is the redirection to numerous external URLs, likely to host further malicious content or phishing pages.

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://74-123-76-197.mgwnet.com/uploads/1/3/1/1/131164033/131164033.html#que+factores+determinan+el+estado+del+tiempo
    • http://gundamtoyshop.com/uploads/1/3/0/2/130288533/f90bdfafe1e43.pdf
    • http://kapispub.com/uploads/1/3/0/6/130620406/zipovobowot-bazikojudebojo-tofaxoxob-divukutifiz.pdf
    • http://kingdomleaders.net/uploads/1/3/0/6/130604765/78c4036fc1.pdf
    • http://cornerstonespm.com/uploads/1/3/0/7/130739260/gisezetidotudufosu.pdf
    • http://jrgenua.com/uploads/1/3/0/5/130542718/9011023.pdf
    • http://sylsays.com/uploads/1/3/0/6/130639032/6575619.pdf
    • http://webyup.net/uploads/1/3/0/6/130604056/gafokojif.pdf
    • http://atvinos.com/uploads/1/3/0/6/130604631/afff78ad.pdf
    • http://modernpavingsystems.com/uploads/1/3/0/9/130969472/b1c7619e46a.pdf
    • http://chronicfab.com/uploads/1/3/0/5/130590229/zakomiwuguba_pipiporu_sekojegine.pdf
    • http://pioneergeneralcontracting.com/uploads/1/3/0/5/130551416/649508.pdf
    • http://untanglingthepast.com/uploads/1/3/0/8/130814774/35af3c4a7c8e02e.pdf
    • http://zorgpanel.nl/uploads/1/3/0/2/130270956/fudajex-zarufukuwax-lotezuzanawi-wawaj.pdf
    • http://vitalbloomwellness.com/uploads/1/3/0/4/130435891/gepujubigo_tujevawir.pdf
    • http://mattprahl.com/uploads/1/3/1/1/131164023/limazoji-kusuxikutavadip-ganodu.pdf
    • http://ljjordan.com/uploads/1/3/0/7/130776185/pirovefinobuxopi.pdf
    • http://xinghetw.com/uploads/1/3/0/5/130589334/sogus_xoxun_nalibeledimu.pdf
    • http://carolyn-blackmore.com/uploads/1/3/0/6/130620929/3aee1.pdf
    • http://actioninchrist.nyc/uploads/1/3/0/4/130476511/5994091.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_off00007d17.bin
33dde68268c6cb3e820fb583405e40bd1c72ba1a1abead0c5873850ff60eaeec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D17 8476 bytes

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