Malicious PDF — malware analysis report

Static analysis result for SHA-256 b73cfaee3e10b124…

MALICIOUS

PDF

53.6 KB Created: 2020-03-29 05:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fc38962c23376f40e7b9135529a98491 SHA-1: bed346f831a984b34a74a88e4005b887b58015a2 SHA-256: b73cfaee3e10b124a4c2d3c00cd8b0d681ac0c32e1922542f6a2efe37af727ae
94 Risk Score

Malware Insights

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

This PDF document exhibits a high-confidence malicious classification due to its structure, which includes a large number of external links to other PDF files hosted across various domains. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this pattern, suggesting a tactic to manipulate search engine results or distribute content. The embedded URLs point to numerous PDF documents, indicating a potential link farm or a method for delivering secondary payloads.

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://ndchair.com/uploads/1/3/1/4/131437831/131437831.html#teorias+de+la+educacion+y+sus+autores
    • http://nlgpdx.com/uploads/1/3/0/5/130589401/worame_kaxiguve_gasoradurut.pdf
    • http://vineyardenvironmentalconsulting.com/uploads/1/3/0/4/130493248/8323046.pdf
    • http://camco-stores.com/uploads/1/3/0/3/130323471/faniwug.pdf
    • http://www.shopplaytherapywithalisia.com/uploads/1/3/0/4/130476320/32588fdf1205.pdf
    • http://www.m-e-w.org/uploads/1/3/0/7/130740060/zesarap_safuseguzewoz_kimuzupedoni.pdf
    • http://cjministry.org/uploads/1/3/0/6/130640199/7a25d760.pdf
    • http://www.nakomaplazaauto.com/uploads/1/3/0/6/130604876/768fb7cc23a2.pdf
    • http://uppsalasimhopp.se/uploads/1/3/0/4/130476974/bajizimozesiru.pdf
    • http://samuelhogan.com/uploads/1/3/0/4/130488604/godufefaneb.pdf
    • http://poppyandjacks.net/uploads/1/3/0/2/130274316/0730f.pdf
    • http://meridianspire.com/uploads/1/3/0/6/130620853/e4dac65cebd322.pdf
    • http://mypuriumsambi.com/uploads/1/3/0/7/130775726/1430fa70a7356a.pdf
    • http://rebuildcm.co/uploads/1/3/1/3/131383720/sivijet_duruje_suwikibitibud.pdf
    • http://quebarato.com.pr/uploads/1/3/0/8/130815115/6860011.pdf
    • http://sallydavisstudio.com/uploads/1/3/0/6/130639542/de6948b07.pdf
    • http://mx.newyorker.beer/uploads/1/3/0/3/130379101/8729189.pdf
    • http://jeffersonsbattleofthebars.com/uploads/1/3/0/8/130873736/9b5ad1e.pdf
    • http://www.behavioralstrategies.org/uploads/1/3/0/7/130776749/6036894.pdf
    • http://smokepublishing.com/uploads/1/3/0/6/130621568/1961430.pdf
    • http://dallinnelsonink.com/uploads/1/3/0/7/130775229/7581c.pdf
    • http://lcrconsulting.org/uploads/1/3/0/7/130776074/4583901.pdf
    • http://mahoneyhouse.com/uploads/1/3/0/7/130738771/71286099577.pdf
    • http://www.ilfuego.com/uploads/1/3/0/5/130550684/9321993.pdf
    • http://ecuador-seo.com/uploads/1/3/0/6/130621570/fewatos.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_off00009255.bin
c8a00500d867cd4997da64bf79e46256ac02d93888690e7e3927af2c940ceb30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9255 8292 bytes
font_01_sfnt_off0000b113.bin
98eae9b279df2ce680d70a4d505064ea756df0c3cbb9cd39c5dd401b12048d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB113 16184 bytes

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