Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a58055609bbcf2e…

MALICIOUS

PDF

37.3 KB Created: 2020-05-21 05:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd2039333c71bbc57252973a0c70088d SHA-1: fd2ce9ce9a85b133576a5333b8020d8f72a8e7f9 SHA-256: 7a58055609bbcf2e943b2f9065ea8ef431fa79e834f6a50871cfbbeca791232a
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The embedded URLs likely serve to redirect users to malicious content or to manipulate search engine rankings. The document body contains garbled text and some of the extracted URLs, suggesting a content-generation process rather than a user-facing document.

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://elitehumanforce.com/uploads/1/3/0/8/130874424/130874424.html#big+hero+6+rule+34
    • http://my-medicare-insurance.com/uploads/1/3/0/5/130589268/pusowineses.pdf
    • http://normasregistry2019.shop/uploads/1/3/0/5/130539935/3b8d5ee7f678.pdf
    • http://enablingenvironments.net/uploads/1/3/0/5/130539414/2131011.pdf
    • http://frosthoneybeefarm.com/uploads/1/3/0/2/130273584/nijed.pdf
    • http://medsatoz.com/uploads/1/3/0/8/130813357/xivajoxudupisobowo.pdf
    • http://coxinspections.net/uploads/1/3/0/5/130551226/watinujixor.pdf
    • http://propertyinvestmentworld.org/uploads/1/3/1/1/131164476/2322655.pdf
    • http://carolinafinngard.es/uploads/1/3/1/4/131454850/lepotonozoluxo.pdf
    • http://bethrayl.com/uploads/1/3/0/7/130776526/7264e969812f207.pdf
    • http://a21stcenturychurch.com/uploads/1/3/1/4/131452893/mulibakikako.pdf
    • http://4thoughtpsychology.com/uploads/1/3/0/7/130776149/boxegotowozo_wumanupanimara.pdf
    • http://samaiyahsart.com/uploads/1/3/1/1/131163914/2481443.pdf
    • http://3ddynamics.org/uploads/1/3/0/8/130813779/virarifafewi_lumubob_napev.pdf
    • http://indizien.info/uploads/1/3/0/6/130620407/posuxa.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_off00006831.bin
fda2009c090e9a3b6f14c93a6f84d792c17de12a913e90793d11f9a68d353670		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6831 9908 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.