Malicious PDF — malware analysis report

Static analysis result for SHA-256 7891e0cd36faa53b…

MALICIOUS

PDF

44.1 KB Created: 2020-05-20 01:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 819c5db91d00158301c60c05dc185cbf SHA-1: 908df39cf04eae91d88d2c03202bf497d0e42a3b SHA-256: 7891e0cd36faa53b18b5dac382d9af6f5bba43813f14cfd8575f8075c55f9167
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains a large number of external links to other PDF files hosted on various domains, indicating a potential link farm or SEO manipulation tactic. The ML classifier strongly flagged this sample as malicious. While no scripts were extracted, the embedded URLs are the primary indicators of malicious intent, likely serving as a lure to a malicious site or further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://alasweetsmore.com/uploads/1/3/0/8/130874108/130874108.html#bluefin+tuna+fishing+reports+north+c
    • http://paradordc.com/uploads/1/3/0/4/130489742/0a069662e.pdf
    • http://btfdohio.com/uploads/1/3/1/1/131164249/9589939.pdf
    • http://couplesws.com/uploads/1/3/0/4/130488934/meser.pdf
    • http://jennalynnhomemade.com/uploads/1/3/1/4/131454501/8538463.pdf
    • http://haleysweetinteriors.com/uploads/1/3/0/7/130739188/e51778.pdf
    • http://goodsamnow.us/uploads/1/3/0/3/130324164/givowazuxaz.pdf
    • http://odysseytrainingsolutionsllc.org/uploads/1/3/0/4/130489522/6625487.pdf
    • http://pangea.investments/uploads/1/3/1/1/131163725/jezuzebapel.pdf
    • http://cowboys4heroes.org/uploads/1/3/0/4/130436188/4866352.pdf
    • http://topclasscreative.com/uploads/1/3/0/8/130813100/xazaxig.pdf
    • http://ajsurf63.com/uploads/1/3/0/5/130541133/6988259.pdf
    • http://loosecannoncresteds.com/uploads/1/3/0/8/130873997/lilonabowubozar.pdf
    • http://roedconstruction.com/uploads/1/3/1/3/131381103/6803df2e6b17a1.pdf
    • http://qqconstruction.net/uploads/1/3/0/5/130543766/sisalowotobavuj.pdf
    • http://kate-hawker.com/uploads/1/3/0/6/130621809/tinoxu.pdf
    • http://donjongamingtavern.com/uploads/1/3/1/6/131606938/kupopozetirumi.pdf
    • http://worldwideawakenings.com/uploads/1/3/0/8/130874680/3b25e.pdf
    • http://nodroenergy.com/uploads/1/3/0/7/130739791/nowaw.pdf
    • http://kennybarrettfilms.com/uploads/1/3/0/5/130543059/7589277.pdf
    • http://rheamedspa.com/uploads/1/3/1/4/131454932/pedivutixelimiw.pdf
    • http://patriot-mech.com/uploads/1/3/0/6/130604940/lijarawez_veliwanun_nibevodota.pdf
    • http://hoodoohemp.com/uploads/1/3/0/7/130775833/1679576.pdf
    • http://westcoastcorks.com/uploads/1/3/1/3/131398237/9060296.pdf
    • http://gobewildcreations.com/uploads/1/3/0/5/130543667/balebexakoviso-sokapa.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008119.bin
6ab773fb40e43d9c78c27e55fb79308ddf42991bdfced509dff6ea617116907a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8119 10248 bytes

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